55544636 has 36 divisors (see below), whose sum is σ = 115228008. Its totient is φ = 23351328.

The previous prime is 55544623. The next prime is 55544651. The reversal of 55544636 is 63644555.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55544636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7715 + ... + 13061.

It is an arithmetic number, because the mean of its divisors is an integer number (3200778).

Almost surely, 2^55544636 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 55544636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57614004).

55544636 is an abundant number, since it is smaller than the sum of its proper divisors (59683372).

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

55544636 is a wasteful number, since it uses less digits than its factorization.

55544636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418 (or 5409 counting only the distinct ones).

The product of its digits is 216000, while the sum is 38.

The square root of 55544636 is about 7452.8273829467. The cubic root of 55544636 is about 381.5464130048.

The spelling of 55544636 in words is "fifty-five million, five hundred forty-four thousand, six hundred thirty-six".