56686479669 has 16 divisors (see below), whose sum is σ = 85403361600. Its totient is φ = 37150460208.

The previous prime is 56686479653. The next prime is 56686479679. The reversal of 56686479669 is 96697468665.

It is a happy number.

It is not a de Polignac number, because 56686479669 - 2⁴ = 56686479653 is a prime.

It is a super-2 number, since 2×56686479669² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56686479597 and 56686479606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56686479649) 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 15 ways as a sum of consecutive naturals, for example, 17790774 + ... + 17793959.

It is an arithmetic number, because the mean of its divisors is an integer number (5337710100).

Almost surely, 2^56686479669 is an apocalyptic number.

56686479669 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

56686479669 is a deficient number, since it is larger than the sum of its proper divisors (28716881931).

56686479669 is a wasteful number, since it uses less digits than its factorization.

56686479669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35584801 (or 35584795 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 72.

The spelling of 56686479669 in words is "fifty-six billion, six hundred eighty-six million, four hundred seventy-nine thousand, six hundred sixty-nine".