56686671523 has 2 divisors, whose sum is σ = 56686671524. Its totient is φ = 56686671522.

The previous prime is 56686671499. The next prime is 56686671527. The reversal of 56686671523 is 32517668665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56686671523 - 2⁵ = 56686671491 is a prime.

It is a super-3 number, since 3×56686671523³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (56686671527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343335761 + 28343335762.

It is an arithmetic number, because the mean of its divisors is an integer number (28343335762).

Almost surely, 2^56686671523 is an apocalyptic number.

56686671523 is a deficient number, since it is larger than the sum of its proper divisors (1).

56686671523 is an equidigital number, since it uses as much as digits as its factorization.

56686671523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 55.

The spelling of 56686671523 in words is "fifty-six billion, six hundred eighty-six million, six hundred seventy-one thousand, five hundred twenty-three".