55649872 has 20 divisors (see below), whose sum is σ = 108105556. Its totient is φ = 27751680.

The previous prime is 55649863. The next prime is 55649897. The reversal of 55649872 is 27894655.

It can be written as a sum of positive squares in 2 ways, for example, as 18974736 + 36675136 = 4356^2 + 6056^2 .

It is a congruent number.

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, 1972 + ... + 10732.

Almost surely, 2^55649872 is an apocalyptic number.

It is an amenable number.

55649872 is a deficient number, since it is larger than the sum of its proper divisors (52455684).

55649872 is a wasteful number, since it uses less digits than its factorization.

55649872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 9160 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 55649872 is about 7459.8841814066. The cubic root of 55649872 is about 381.7872228592.

The spelling of 55649872 in words is "fifty-five million, six hundred forty-nine thousand, eight hundred seventy-two".