55787900928 has 104 divisors (see below), whose sum is σ = 156579156000. Its totient is φ = 17617158144.

The previous prime is 55787900911. The next prime is 55787900957. The reversal of 55787900928 is 82900978755.

It is a super-2 number, since 2×55787900928² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 113998 + ... + 352946.

Almost surely, 2^55787900928 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 55787900928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78289578000).

55787900928 is an abundant number, since it is smaller than the sum of its proper divisors (100791255072).

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

55787900928 is a wasteful number, since it uses less digits than its factorization.

55787900928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238995 (or 238973 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 60.

The spelling of 55787900928 in words is "fifty-five billion, seven hundred eighty-seven million, nine hundred thousand, nine hundred twenty-eight".