55615472505 has 32 divisors (see below), whose sum is σ = 98924094720. Its totient is φ = 29645942400.

The previous prime is 55615472501. The next prime is 55615472587. The reversal of 55615472505 is 50527451655.

55615472505 is a `hidden beast` number, since 5 + 5 + 615 + 4 + 7 + 25 + 0 + 5 = 666.

It is not a de Polignac number, because 55615472505 - 2² = 55615472501 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (55615472501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150580 + ... + 365930.

It is an arithmetic number, because the mean of its divisors is an integer number (3091377960).

Almost surely, 2^55615472505 is an apocalyptic number.

It is an amenable number.

55615472505 is a deficient number, since it is larger than the sum of its proper divisors (43308622215).

55615472505 is a wasteful number, since it uses less digits than its factorization.

55615472505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217278 (or 217272 counting only the distinct ones).

The product of its (nonzero) digits is 1050000, while the sum is 45.

The spelling of 55615472505 in words is "fifty-five billion, six hundred fifteen million, four hundred seventy-two thousand, five hundred five".