55911516 has 12 divisors (see below), whose sum is σ = 130460232. Its totient is φ = 18637168.

The previous prime is 55911497. The next prime is 55911523. The reversal of 55911516 is 61511955.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2329635 + ... + 2329658.

It is an arithmetic number, because the mean of its divisors is an integer number (10871686).

Almost surely, 2^55911516 is an apocalyptic number.

It is an amenable number.

55911516 is an abundant number, since it is smaller than the sum of its proper divisors (74548716).

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

55911516 is a wasteful number, since it uses less digits than its factorization.

55911516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659300 (or 4659298 counting only the distinct ones).

The product of its digits is 6750, while the sum is 33.

The square root of 55911516 is about 7477.4003503892. The cubic root of 55911516 is about 382.3846258036.

The spelling of 55911516 in words is "fifty-five million, nine hundred eleven thousand, five hundred sixteen".