11656657219 has 2 divisors, whose sum is σ = 11656657220. Its totient is φ = 11656657218.

The previous prime is 11656657141. The next prime is 11656657247. The reversal of 11656657219 is 91275665611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11656657219 - 2²⁵ = 11623102787 is a prime.

It is a super-2 number, since 2×11656657219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11656657249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828328609 + 5828328610.

It is an arithmetic number, because the mean of its divisors is an integer number (5828328610).

Almost surely, 2^11656657219 is an apocalyptic number.

11656657219 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656657219 is an equidigital number, since it uses as much as digits as its factorization.

11656657219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 49.

The spelling of 11656657219 in words is "eleven billion, six hundred fifty-six million, six hundred fifty-seven thousand, two hundred nineteen".