55611570 has 48 divisors (see below), whose sum is σ = 155262528. Its totient is φ = 12710880.

The previous prime is 55611559. The next prime is 55611581. The reversal of 55611570 is 7511655.

It is an interprime number because it is at equal distance from previous prime (55611559) and next prime (55611581).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17446 + ... + 20385.

It is an arithmetic number, because the mean of its divisors is an integer number (3234636).

Almost surely, 2^55611570 is an apocalyptic number.

55611570 is an abundant number, since it is smaller than the sum of its proper divisors (99650958).

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

55611570 is a wasteful number, since it uses less digits than its factorization.

55611570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37855 (or 37848 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 55611570 is about 7457.3165414913. The cubic root of 55611570 is about 381.6996121731.

The spelling of 55611570 in words is "fifty-five million, six hundred eleven thousand, five hundred seventy".