55862865 has 20 divisors (see below), whose sum is σ = 100140084. Its totient is φ = 29793312.

The previous prime is 55862809. The next prime is 55862879. The reversal of 55862865 is 56826855.

55862865 is a `hidden beast` number, since 5 + 586 + 2 + 8 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33281361 + 22581504 = 5769^2 + 4752^2 .

It is not a de Polignac number, because 55862865 - 2⁹ = 55862353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55862865.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68562 + ... + 69371.

Almost surely, 2^55862865 is an apocalyptic number.

It is an amenable number.

55862865 is a deficient number, since it is larger than the sum of its proper divisors (44277219).

55862865 is a wasteful number, since it uses less digits than its factorization.

55862865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137950 (or 137941 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The square root of 55862865 is about 7474.1464395608. The cubic root of 55862865 is about 382.2736838830.

The spelling of 55862865 in words is "fifty-five million, eight hundred sixty-two thousand, eight hundred sixty-five".