55771788 has 24 divisors (see below), whose sum is σ = 131783680. Its totient is φ = 18354960.

The previous prime is 55771753. The next prime is 55771801. The reversal of 55771788 is 88717755.

It is a happy number.

It is a super-2 number, since 2×55771788² = 6220984673433888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28468 + ... + 30363.

Almost surely, 2^55771788 is an apocalyptic number.

It is an amenable number.

55771788 is an abundant number, since it is smaller than the sum of its proper divisors (76011892).

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

55771788 is a wasteful number, since it uses less digits than its factorization.

55771788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58917 (or 58915 counting only the distinct ones).

The product of its digits is 548800, while the sum is 48.

The square root of 55771788 is about 7468.0511514049. The cubic root of 55771788 is about 382.0658220138.

The spelling of 55771788 in words is "fifty-five million, seven hundred seventy-one thousand, seven hundred eighty-eight".