55516880 has 20 divisors (see below), whose sum is σ = 129076932. Its totient is φ = 22206720.

The previous prime is 55516831. The next prime is 55516919. The reversal of 55516880 is 8861555.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 38837824 = 4084^2 + 6232^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346901 + ... + 347060.

Almost surely, 2^55516880 is an apocalyptic number.

It is an amenable number.

55516880 is an abundant number, since it is smaller than the sum of its proper divisors (73560052).

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

55516880 is a wasteful number, since it uses less digits than its factorization.

55516880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693974 (or 693968 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 55516880 is about 7450.9650381679. The cubic root of 55516880 is about 381.4828487108.

The spelling of 55516880 in words is "fifty-five million, five hundred sixteen thousand, eight hundred eighty".