22355597721600 has 4320 divisors, whose sum is σ = 105724243215360. Its totient is φ = 4586471424000.

The previous prime is 22355597721593. The next prime is 22355597721607. The reversal of 22355597721600 is 612779555322.

22355597721600 is a `hidden beast` number, since 2 + 2 + 3 + 5 + 5 + 5 + 9 + 7 + 7 + 21 + 600 = 666.

It is an interprime number because it is at equal distance from previous prime (22355597721593) and next prime (22355597721607).

It is a tau number, because it is divible by the number of its divisors (4320).

It is a super-2 number, since 2×22355597721600² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22355597721607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 721148313585 + ... + 721148313615.

It is an arithmetic number, because the mean of its divisors is an integer number (24473204448).

Almost surely, 2^{22355597721600} is an apocalyptic number.

22355597721600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22355597721600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52862121607680).

22355597721600 is an abundant number, since it is smaller than the sum of its proper divisors (83368645493760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22355597721600 is a wasteful number, since it uses less digits than its factorization.

22355597721600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 54.

The spelling of 22355597721600 in words is "twenty-two trillion, three hundred fifty-five billion, five hundred ninety-seven million, seven hundred twenty-one thousand, six hundred".