55665516426 has 32 divisors (see below), whose sum is σ = 120604424640. Its totient is φ = 17127847152.

The previous prime is 55665516419. The next prime is 55665516457. The reversal of 55665516426 is 62461556655.

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, 2098240 + ... + 2124603.

It is an arithmetic number, because the mean of its divisors is an integer number (3768888270).

Almost surely, 2^55665516426 is an apocalyptic number.

55665516426 is an abundant number, since it is smaller than the sum of its proper divisors (64938908214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55665516426 is a wasteful number, since it uses less digits than its factorization.

55665516426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222887 (or 4222861 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 51.

The spelling of 55665516426 in words is "fifty-five billion, six hundred sixty-five million, five hundred sixteen thousand, four hundred twenty-six".