55972616 has 32 divisors (see below), whose sum is σ = 125159040. Its totient is φ = 22944768.

The previous prime is 55972597. The next prime is 55972643. The reversal of 55972616 is 61627955.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 20441 + ... + 23016.

It is an arithmetic number, because the mean of its divisors is an integer number (3911220).

Almost surely, 2^55972616 is an apocalyptic number.

55972616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55972616 is an abundant number, since it is smaller than the sum of its proper divisors (69186424).

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

55972616 is a wasteful number, since it uses less digits than its factorization.

55972616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43493 (or 43489 counting only the distinct ones).

The product of its digits is 113400, while the sum is 41.

The square root of 55972616 is about 7481.4848793538. The cubic root of 55972616 is about 382.5238648302.

The spelling of 55972616 in words is "fifty-five million, nine hundred seventy-two thousand, six hundred sixteen".