55615760 has 40 divisors (see below), whose sum is σ = 131509440. Its totient is φ = 21867392.

The previous prime is 55615759. The next prime is 55615799. The reversal of 55615760 is 6751655.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×55615760² = 6186225520755200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55615760.

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, 1172 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (3287736).

Almost surely, 2^55615760 is an apocalyptic number.

It is an amenable number.

55615760 is an abundant number, since it is smaller than the sum of its proper divisors (75893680).

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

55615760 is a wasteful number, since it uses less digits than its factorization.

55615760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11855 (or 11849 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 55615760 is about 7457.5974683540. The cubic root of 55615760 is about 381.7091981952.

The spelling of 55615760 in words is "fifty-five million, six hundred fifteen thousand, seven hundred sixty".