55672561 has 8 divisors (see below), whose sum is σ = 63929024. Its totient is φ = 47491920.

The previous prime is 55672549. The next prime is 55672571. The reversal of 55672561 is 16527655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-55672561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55672561.

It is not an unprimeable number, because it can be changed into a prime (55672541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17370 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (7991128).

Almost surely, 2^55672561 is an apocalyptic number.

It is an amenable number.

55672561 is a deficient number, since it is larger than the sum of its proper divisors (8256463).

55672561 is a wasteful number, since it uses less digits than its factorization.

55672561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37911.

The product of its digits is 63000, while the sum is 37.

The square root of 55672561 is about 7461.4047604992. The cubic root of 55672561 is about 381.8391019442.

It can be divided in two parts, 5567 and 2561, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 55672561 in words is "fifty-five million, six hundred seventy-two thousand, five hundred sixty-one".