55587166917 has 4 divisors (see below), whose sum is σ = 74116222560. Its totient is φ = 37058111276.

The previous prime is 55587166909. The next prime is 55587166991. The reversal of 55587166917 is 71966178555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55587166917 - 2³ = 55587166909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55587165917) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9264527817 + ... + 9264527822.

It is an arithmetic number, because the mean of its divisors is an integer number (18529055640).

Almost surely, 2^55587166917 is an apocalyptic number.

It is an amenable number.

55587166917 is a deficient number, since it is larger than the sum of its proper divisors (18529055643).

55587166917 is a wasteful number, since it uses less digits than its factorization.

55587166917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18529055642.

The product of its digits is 15876000, while the sum is 60.

The spelling of 55587166917 in words is "fifty-five billion, five hundred eighty-seven million, one hundred sixty-six thousand, nine hundred seventeen".