55597688499 has 4 divisors (see below), whose sum is σ = 74130251336. Its totient is φ = 37065125664.

The previous prime is 55597688453. The next prime is 55597688557. The reversal of 55597688499 is 99488679555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55597688499 - 2¹⁵ = 55597655731 is a prime.

It is a super-2 number, since 2×55597688499² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55597688499.

It is not an unprimeable number, because it can be changed into a prime (55597683499) 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, 9266281414 + ... + 9266281419.

It is an arithmetic number, because the mean of its divisors is an integer number (18532562834).

Almost surely, 2^55597688499 is an apocalyptic number.

55597688499 is a deficient number, since it is larger than the sum of its proper divisors (18532562837).

55597688499 is a wasteful number, since it uses less digits than its factorization.

55597688499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18532562836.

The product of its digits is 979776000, while the sum is 75.

The spelling of 55597688499 in words is "fifty-five billion, five hundred ninety-seven million, six hundred eighty-eight thousand, four hundred ninety-nine".