55661136 has 40 divisors (see below), whose sum is σ = 144068160. Its totient is φ = 18518016.

The previous prime is 55661129. The next prime is 55661147. The reversal of 55661136 is 63116655.

It is a junction number, because it is equal to n+sod(n) for n = 55661097 and 55661106.

It is a congruent number.

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, 38800 + ... + 40208.

It is an arithmetic number, because the mean of its divisors is an integer number (3601704).

Almost surely, 2^55661136 is an apocalyptic number.

It is an amenable number.

55661136 is an abundant number, since it is smaller than the sum of its proper divisors (88407024).

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

55661136 is a wasteful number, since it uses less digits than its factorization.

55661136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243 (or 2237 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 55661136 is about 7460.6391147140. The cubic root of 55661136 is about 381.8129800982.

The spelling of 55661136 in words is "fifty-five million, six hundred sixty-one thousand, one hundred thirty-six".