55639356 has 12 divisors (see below), whose sum is σ = 129825192. Its totient is φ = 18546448.

The previous prime is 55639321. The next prime is 55639357. The reversal of 55639356 is 65393655.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55639357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318295 + ... + 2318318.

It is an arithmetic number, because the mean of its divisors is an integer number (10818766).

Almost surely, 2^55639356 is an apocalyptic number.

It is an amenable number.

55639356 is an abundant number, since it is smaller than the sum of its proper divisors (74185836).

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

55639356 is a wasteful number, since it uses less digits than its factorization.

55639356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636620 (or 4636618 counting only the distinct ones).

The product of its digits is 364500, while the sum is 42.

The square root of 55639356 is about 7459.1793114256. The cubic root of 55639356 is about 381.7631729245.

The spelling of 55639356 in words is "fifty-five million, six hundred thirty-nine thousand, three hundred fifty-six".