55919560 has 16 divisors (see below), whose sum is σ = 125819100. Its totient is φ = 22367808.

The previous prime is 55919557. The next prime is 55919573. The reversal of 55919560 is 6591955.

It can be written as a sum of positive squares in 2 ways, for example, as 54493924 + 1425636 = 7382^2 + 1194^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1397989 = 55919560 / (5 + 5 + 9 + 1 + 9 + 5 + 6 + 0).

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, 698955 + ... + 699034.

Almost surely, 2^55919560 is an apocalyptic number.

It is an amenable number.

55919560 is an abundant number, since it is smaller than the sum of its proper divisors (69899540).

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

55919560 is a wasteful number, since it uses less digits than its factorization.

55919560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398000 (or 1397996 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 55919560 is about 7477.9382185199. The cubic root of 55919560 is about 382.4029628395.

It can be divided in two parts, 5591 and 9560, that added together give a palindrome (15151).

The spelling of 55919560 in words is "fifty-five million, nine hundred nineteen thousand, five hundred sixty".