55691568679 has 4 divisors (see below), whose sum is σ = 55693421784. Its totient is φ = 55689715576.

The previous prime is 55691568677. The next prime is 55691568701. The reversal of 55691568679 is 97686519655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55691568679 - 2¹ = 55691568677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55691568677) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 880717 + ... + 941830.

It is an arithmetic number, because the mean of its divisors is an integer number (13923355446).

Almost surely, 2^55691568679 is an apocalyptic number.

55691568679 is a deficient number, since it is larger than the sum of its proper divisors (1853105).

55691568679 is a wasteful number, since it uses less digits than its factorization.

55691568679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853104.

The product of its digits is 122472000, while the sum is 67.

The spelling of 55691568679 in words is "fifty-five billion, six hundred ninety-one million, five hundred sixty-eight thousand, six hundred seventy-nine".