55774398960 has 960 divisors, whose sum is σ = 234499276800. Its totient is φ = 12134707200.

The previous prime is 55774398923. The next prime is 55774399061. The reversal of 55774398960 is 6989347755.

55774398960 is a `hidden beast` number, since 55 + 77 + 439 + 89 + 6 + 0 = 666.

It is a super-2 number, since 2×55774398960² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 292012465 + ... + 292012655.

It is an arithmetic number, because the mean of its divisors is an integer number (244270080).

Almost surely, 2^55774398960 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 55774398960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117249638400).

55774398960 is an abundant number, since it is smaller than the sum of its proper divisors (178724877840).

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

55774398960 is a wasteful number, since it uses less digits than its factorization.

55774398960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 55774398960 in words is "fifty-five billion, seven hundred seventy-four million, three hundred ninety-eight thousand, nine hundred sixty".