55788738864 has 80 divisors (see below), whose sum is σ = 150179361120. Its totient is φ = 17823877120.

The previous prime is 55788738791. The next prime is 55788738869. The reversal of 55788738864 is 46883788755.

It is a super-2 number, since 2×55788738864² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55788738869) 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 15 ways as a sum of consecutive naturals, for example, 44434 + ... + 336974.

It is an arithmetic number, because the mean of its divisors is an integer number (1877242014).

Almost surely, 2^55788738864 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 55788738864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75089680560).

55788738864 is an abundant number, since it is smaller than the sum of its proper divisors (94390622256).

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

55788738864 is a wasteful number, since it uses less digits than its factorization.

55788738864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292718 (or 292712 counting only the distinct ones).

The product of its digits is 361267200, while the sum is 69.

The spelling of 55788738864 in words is "fifty-five billion, seven hundred eighty-eight million, seven hundred thirty-eight thousand, eight hundred sixty-four".