621622905456 has 240 divisors, whose sum is σ = 1967442825600. Its totient is φ = 168166043136.

The previous prime is 621622905401. The next prime is 621622905473. The reversal of 621622905456 is 654509226126.

It is a super-2 number, since 2×621622905456² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131335666 + ... + 131340398.

It is an arithmetic number, because the mean of its divisors is an integer number (8197678440).

Almost surely, 2^621622905456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621622905456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983721412800).

621622905456 is an abundant number, since it is smaller than the sum of its proper divisors (1345819920144).

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

621622905456 is a wasteful number, since it uses less digits than its factorization.

621622905456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7716 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 621622905456 in words is "six hundred twenty-one billion, six hundred twenty-two million, nine hundred five thousand, four hundred fifty-six".