11656656168431 has 2 divisors, whose sum is σ = 11656656168432. Its totient is φ = 11656656168430.

The previous prime is 11656656168427. The next prime is 11656656168463. The reversal of 11656656168431 is 13486165665611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11656656168431 - 2² = 11656656168427 is a prime.

It is a super-2 number, since 2×11656656168431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11656656108431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828328084215 + 5828328084216.

It is an arithmetic number, because the mean of its divisors is an integer number (5828328084216).

Almost surely, 2^{11656656168431} is an apocalyptic number.

11656656168431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656656168431 is an equidigital number, since it uses as much as digits as its factorization.

11656656168431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 59.

The spelling of 11656656168431 in words is "eleven trillion, six hundred fifty-six billion, six hundred fifty-six million, one hundred sixty-eight thousand, four hundred thirty-one".