55885466640 has 80 divisors (see below), whose sum is σ = 173301193728. Its totient is φ = 14897952768.

The previous prime is 55885466639. The next prime is 55885466713. The reversal of 55885466640 is 4666458855.

It is a tau number, because it is divible by the number of its divisors (80).

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, 735889 + ... + 808271.

Almost surely, 2^55885466640 is an apocalyptic number.

It is an amenable number.

55885466640 is an abundant number, since it is smaller than the sum of its proper divisors (117415727088).

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

55885466640 is a wasteful number, since it uses less digits than its factorization.

55885466640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75616 (or 75610 counting only the distinct ones).

The product of its (nonzero) digits is 27648000, while the sum is 57.

The spelling of 55885466640 in words is "fifty-five billion, eight hundred eighty-five million, four hundred sixty-six thousand, six hundred forty".