11656565067 has 12 divisors (see below), whose sum is σ = 18079570536. Its totient is φ = 6660894240.

The previous prime is 11656565033. The next prime is 11656565131. The reversal of 11656565067 is 76056565611.

It is not a de Polignac number, because 11656565067 - 2¹⁵ = 11656532299 is a prime.

It is a super-2 number, since 2×11656565067² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11656565027) 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, 39648034 + ... + 39648327.

It is an arithmetic number, because the mean of its divisors is an integer number (1506630878).

Almost surely, 2^11656565067 is an apocalyptic number.

11656565067 is a deficient number, since it is larger than the sum of its proper divisors (6423005469).

11656565067 is an equidigital number, since it uses as much as digits as its factorization.

11656565067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79296378 (or 79296371 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 11656565067 in words is "eleven billion, six hundred fifty-six million, five hundred sixty-five thousand, sixty-seven".