56686999999 has 12 divisors (see below), whose sum is σ = 66002194224. Its totient is φ = 48544518624.

The previous prime is 56686999921. The next prime is 56687000011. The reversal of 56686999999 is 99999968665.

It is a happy number.

It is not a de Polignac number, because 56686999999 - 2¹³ = 56686991807 is a prime.

It is a Duffinian number.

56686999999 is a modest number, since divided by 999999 gives 56686 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56686999399) 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, 473539 + ... + 581044.

It is an arithmetic number, because the mean of its divisors is an integer number (5500182852).

Almost surely, 2^56686999999 is an apocalyptic number.

56686999999 is a deficient number, since it is larger than the sum of its proper divisors (9315194225).

56686999999 is a wasteful number, since it uses less digits than its factorization.

56686999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055694 (or 1055687 counting only the distinct ones).

The product of its digits is 4591650240, while the sum is 85.

The spelling of 56686999999 in words is "fifty-six billion, six hundred eighty-six million, nine hundred ninety-nine thousand, nine hundred ninety-nine".