55131583665 has 16 divisors (see below), whose sum is σ = 88220362176. Its totient is φ = 29400235200.

The previous prime is 55131583657. The next prime is 55131583691. The reversal of 55131583665 is 56638513155.

It is not a de Polignac number, because 55131583665 - 2³ = 55131583657 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 62451 + ... + 337880.

It is an arithmetic number, because the mean of its divisors is an integer number (5513772636).

Almost surely, 2^55131583665 is an apocalyptic number.

It is an amenable number.

55131583665 is a deficient number, since it is larger than the sum of its proper divisors (33088778511).

55131583665 is a wasteful number, since it uses less digits than its factorization.

55131583665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409520.

The product of its digits is 1620000, while the sum is 48.

The spelling of 55131583665 in words is "fifty-five billion, one hundred thirty-one million, five hundred eighty-three thousand, six hundred sixty-five".