55775863 has 16 divisors (see below), whose sum is σ = 65923200. Its totient is φ = 46522080.

The previous prime is 55775857. The next prime is 55775879. The reversal of 55775863 is 36857755.

It is not a de Polignac number, because 55775863 - 2⁵ = 55775831 is a prime.

It is a super-2 number, since 2×55775863² = 6221893786789538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55775803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24508 + ... + 26686.

It is an arithmetic number, because the mean of its divisors is an integer number (4120200).

Almost surely, 2^55775863 is an apocalyptic number.

55775863 is a deficient number, since it is larger than the sum of its proper divisors (10147337).

55775863 is a wasteful number, since it uses less digits than its factorization.

55775863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382.

The product of its digits is 882000, while the sum is 46.

The square root of 55775863 is about 7468.3239752973. The cubic root of 55775863 is about 382.0751270786.

The spelling of 55775863 in words is "fifty-five million, seven hundred seventy-five thousand, eight hundred sixty-three".