55540605915 has 48 divisors (see below), whose sum is σ = 101370297600. Its totient is φ = 28053470016.

The previous prime is 55540605863. The next prime is 55540605947. The reversal of 55540605915 is 51950604555.

55540605915 is a `hidden beast` number, since 5 + 5 + 54 + 0 + 6 + 0 + 591 + 5 = 666.

It is not a de Polignac number, because 55540605915 - 2¹⁰ = 55540604891 is a prime.

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 (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3171012 + ... + 3188478.

It is an arithmetic number, because the mean of its divisors is an integer number (2111881200).

Almost surely, 2^55540605915 is an apocalyptic number.

55540605915 is a deficient number, since it is larger than the sum of its proper divisors (45829691685).

55540605915 is a wasteful number, since it uses less digits than its factorization.

55540605915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21216 (or 21213 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 55540605915 in words is "fifty-five billion, five hundred forty million, six hundred five thousand, nine hundred fifteen".