55590076820 has 18 divisors (see below), whose sum is σ = 116741375646. Its totient is φ = 22235608960.

The previous prime is 55590076819. The next prime is 55590076831. The reversal of 55590076820 is 2867009555.

It can be written as a sum of positive squares in 3 ways, for example, as 1423100176 + 54166976644 = 37724^2 + 232738^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1028060 + ... + 1080780.

Almost surely, 2^55590076820 is an apocalyptic number.

It is an amenable number.

55590076820 is an abundant number, since it is smaller than the sum of its proper divisors (61151298826).

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

55590076820 is an frugal number, since it uses more digits than its factorization.

55590076820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105451 (or 52728 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 55590076820 in words is "fifty-five billion, five hundred ninety million, seventy-six thousand, eight hundred twenty".