55500557580 has 72 divisors (see below), whose sum is σ = 181301829072. Its totient is φ = 13661675136.

The previous prime is 55500557551. The next prime is 55500557591. The reversal of 55500557580 is 8575500555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 11856754 + ... + 11861433.

Almost surely, 2^55500557580 is an apocalyptic number.

It is an amenable number.

55500557580 is an abundant number, since it is smaller than the sum of its proper divisors (125801271492).

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

55500557580 is a wasteful number, since it uses less digits than its factorization.

55500557580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23718215 (or 23718210 counting only the distinct ones).

The product of its (nonzero) digits is 875000, while the sum is 45.

The spelling of 55500557580 in words is "fifty-five billion, five hundred million, five hundred fifty-seven thousand, five hundred eighty".