55816784 has 20 divisors (see below), whose sum is σ = 108308916. Its totient is φ = 27866112.

The previous prime is 55816759. The next prime is 55816799. The reversal of 55816784 is 48761855.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1056784 + 54760000 = 1028^2 + 7400^2 .

It is a super-2 number, since 2×55816784² = 6231026752205312, which 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 3 ways as a sum of consecutive naturals, for example, 10112 + ... + 14624.

Almost surely, 2^55816784 is an apocalyptic number.

It is an amenable number.

55816784 is a deficient number, since it is larger than the sum of its proper divisors (52492132).

55816784 is a wasteful number, since it uses less digits than its factorization.

55816784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294 (or 5288 counting only the distinct ones).

The product of its digits is 268800, while the sum is 44.

The square root of 55816784 is about 7471.0631104281. The cubic root of 55816784 is about 382.1685430796.

The spelling of 55816784 in words is "fifty-five million, eight hundred sixteen thousand, seven hundred eighty-four".