55420313664 has 56 divisors (see below), whose sum is σ = 146728728640. Its totient is φ = 18461366784.

The previous prime is 55420313659. The next prime is 55420313693. The reversal of 55420313664 is 46631302455.

It is a super-2 number, since 2×55420313664² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202722 + ... + 389790.

Almost surely, 2^55420313664 is an apocalyptic number.

It is an amenable number.

55420313664 is an abundant number, since it is smaller than the sum of its proper divisors (91308414976).

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

55420313664 is a wasteful number, since it uses less digits than its factorization.

55420313664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188627 (or 188617 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 55420313664 in words is "fifty-five billion, four hundred twenty million, three hundred thirteen thousand, six hundred sixty-four".