11656656168464 has 20 divisors (see below), whose sum is σ = 22587323840700. Its totient is φ = 5827669370880.

The previous prime is 11656656168463. The next prime is 11656656168533. The reversal of 11656656168464 is 46486165665611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 316653798400 + 11340002370064 = 562720^2 + 3367492^2 .

It is a super-2 number, since 2×11656656168464² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11656656168464.

It is not an unprimeable number, because it can be changed into a prime (11656656168463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41023577 + ... + 41306744.

It is an arithmetic number, because the mean of its divisors is an integer number (1129366192035).

Almost surely, 2^{11656656168464} is an apocalyptic number.

It is an amenable number.

11656656168464 is a deficient number, since it is larger than the sum of its proper divisors (10930667672236).

11656656168464 is an equidigital number, since it uses as much as digits as its factorization.

11656656168464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82339178 (or 82339172 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 65.

The spelling of 11656656168464 in words is "eleven trillion, six hundred fifty-six billion, six hundred fifty-six million, one hundred sixty-eight thousand, four hundred sixty-four".