55609956 has 48 divisors (see below), whose sum is σ = 144883200. Its totient is φ = 18445536.

The previous prime is 55609949. The next prime is 55609973. The reversal of 55609956 is 65990655.

55609956 is a `hidden beast` number, since 556 + 0 + 9 + 95 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22930 + ... + 25238.

It is an arithmetic number, because the mean of its divisors is an integer number (3018400).

Almost surely, 2^55609956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55609956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72441600).

55609956 is an abundant number, since it is smaller than the sum of its proper divisors (89273244).

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

55609956 is a wasteful number, since it uses less digits than its factorization.

55609956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 45.

The square root of 55609956 is about 7457.2083248358. The cubic root of 55609956 is about 381.6959194815.

It can be divided in two parts, 55609 and 956, that added together give a palindrome (56565).

The spelling of 55609956 in words is "fifty-five million, six hundred nine thousand, nine hundred fifty-six".