55423478880000 has 5760 divisors, whose sum is σ = 275962039879680. Its totient is φ = 10839121920000.

The previous prime is 55423478879999. The next prime is 55423478880001. The reversal of 55423478880000 is 8887432455.

55423478880000 is a `hidden beast` number, since 55 + 42 + 3 + 478 + 8 + 80 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55423478879999) and next prime (55423478880001).

It is a tau number, because it is divible by the number of its divisors (5760).

It is a super-2 number, since 2×55423478880000² (a number of 28 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 (55423478880001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 3260204639992 + ... + 3260204640008.

It is an arithmetic number, because the mean of its divisors is an integer number (47910076368).

Almost surely, 2^{55423478880000} is an apocalyptic number.

55423478880000 is a gapful number since it is divisible by the number (50) 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 55423478880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137981019939840).

55423478880000 is an abundant number, since it is smaller than the sum of its proper divisors (220538560999680).

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

55423478880000 is an frugal number, since it uses more digits than its factorization.

55423478880000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 55423478880000 in words is "fifty-five trillion, four hundred twenty-three billion, four hundred seventy-eight million, eight hundred eighty thousand".