55209355864 has 16 divisors (see below), whose sum is σ = 111480430320. Its totient is φ = 25481241120.

The previous prime is 55209355841. The next prime is 55209355891. The reversal of 55209355864 is 46855390255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 265429492 + ... + 265429699.

It is an arithmetic number, because the mean of its divisors is an integer number (6967526895).

Almost surely, 2^55209355864 is an apocalyptic number.

It is an amenable number.

55209355864 is an abundant number, since it is smaller than the sum of its proper divisors (56271074456).

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

55209355864 is a wasteful number, since it uses less digits than its factorization.

55209355864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530859210 (or 530859206 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 52.

The spelling of 55209355864 in words is "fifty-five billion, two hundred nine million, three hundred fifty-five thousand, eight hundred sixty-four".