55772668865 has 16 divisors (see below), whose sum is σ = 67095055296. Its totient is φ = 44506353600.

The previous prime is 55772668843. The next prime is 55772668883. The reversal of 55772668865 is 56886627755.

It is not a de Polignac number, because 55772668865 - 2⁶ = 55772668801 is a prime.

It is a super-2 number, since 2×55772668865² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 4303295 + ... + 4316235.

It is an arithmetic number, because the mean of its divisors is an integer number (4193440956).

Almost surely, 2^55772668865 is an apocalyptic number.

It is an amenable number.

55772668865 is a deficient number, since it is larger than the sum of its proper divisors (11322386431).

55772668865 is a wasteful number, since it uses less digits than its factorization.

55772668865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15040.

The product of its digits is 169344000, while the sum is 65.

The spelling of 55772668865 in words is "fifty-five billion, seven hundred seventy-two million, six hundred sixty-eight thousand, eight hundred sixty-five".