55553318577 has 12 divisors (see below), whose sum is σ = 80651013300. Its totient is φ = 36847546848.

The previous prime is 55553318567. The next prime is 55553318627. The reversal of 55553318577 is 77581335555.

55553318577 is a `hidden beast` number, since 5 + 5 + 5 + 53 + 3 + 18 + 577 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49807526976 + 5745791601 = 223176^2 + 75801^2 .

It is not a de Polignac number, because 55553318577 - 2¹¹ = 55553316529 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55553318537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15664702 + ... + 15668247.

It is an arithmetic number, because the mean of its divisors is an integer number (6720917775).

Almost surely, 2^55553318577 is an apocalyptic number.

It is an amenable number.

55553318577 is a deficient number, since it is larger than the sum of its proper divisors (25097694723).

55553318577 is a wasteful number, since it uses less digits than its factorization.

55553318577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31333152 (or 31333149 counting only the distinct ones).

The product of its digits is 11025000, while the sum is 54.

The spelling of 55553318577 in words is "fifty-five billion, five hundred fifty-three million, three hundred eighteen thousand, five hundred seventy-seven".