55809923520 has 112 divisors (see below), whose sum is σ = 190827050400. Its totient is φ = 13737824256.

The previous prime is 55809923483. The next prime is 55809923563. The reversal of 55809923520 is 2532990855.

It is a super-2 number, since 2×55809923520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 55809923520.

It is a congruent number.

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, 2223495 + ... + 2248454.

It is an arithmetic number, because the mean of its divisors is an integer number (1703812950).

Almost surely, 2^55809923520 is an apocalyptic number.

It is an amenable number.

55809923520 is an abundant number, since it is smaller than the sum of its proper divisors (135017126880).

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

55809923520 is a wasteful number, since it uses less digits than its factorization.

55809923520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471982 (or 4471972 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 55809923520 in words is "fifty-five billion, eight hundred nine million, nine hundred twenty-three thousand, five hundred twenty".