55768985 has 16 divisors (see below), whose sum is σ = 68487120. Its totient is φ = 43580160.

The previous prime is 55768967. The next prime is 55769017. The reversal of 55768985 is 58986755.

It can be written as a sum of positive squares in 8 ways, for example, as 1201216 + 54567769 = 1096^2 + 7387^2 .

It is not a de Polignac number, because 55768985 - 2⁸ = 55768729 is a prime.

It is a super-2 number, since 2×55768985² = 6220359375860450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102815 + ... + 103355.

It is an arithmetic number, because the mean of its divisors is an integer number (4280445).

Almost surely, 2^55768985 is an apocalyptic number.

It is an amenable number.

55768985 is a deficient number, since it is larger than the sum of its proper divisors (12718135).

55768985 is a wasteful number, since it uses less digits than its factorization.

55768985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its digits is 3024000, while the sum is 53.

The square root of 55768985 is about 7467.8634829515. The cubic root of 55768985 is about 382.0594212362.

The spelling of 55768985 in words is "fifty-five million, seven hundred sixty-eight thousand, nine hundred eighty-five".