55787736800 has 36 divisors (see below), whose sum is σ = 136191814416. Its totient is φ = 22315094400.

The previous prime is 55787736743. The next prime is 55787736841. The reversal of 55787736800 is 863778755.

It is a super-2 number, since 2×55787736800² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34866536 + ... + 34868135.

It is an arithmetic number, because the mean of its divisors is an integer number (3783105956).

Almost surely, 2^55787736800 is an apocalyptic number.

55787736800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55787736800 is an abundant number, since it is smaller than the sum of its proper divisors (80404077616).

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

55787736800 is a wasteful number, since it uses less digits than its factorization.

55787736800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69734691 (or 69734678 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 55787736800 in words is "fifty-five billion, seven hundred eighty-seven million, seven hundred thirty-six thousand, eight hundred".