11656454021617 has 16 divisors (see below), whose sum is σ = 11738791526400. Its totient is φ = 11574346314960.

The previous prime is 11656454021593. The next prime is 11656454021647. The reversal of 11656454021617 is 71612045465611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11656454021617 is a prime.

It is a super-2 number, since 2×11656454021617² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11656454021647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048330984 + ... + 1048342102.

It is an arithmetic number, because the mean of its divisors is an integer number (733674470400).

Almost surely, 2^{11656454021617} is an apocalyptic number.

It is an amenable number.

11656454021617 is a deficient number, since it is larger than the sum of its proper divisors (82337504783).

11656454021617 is a wasteful number, since it uses less digits than its factorization.

11656454021617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20796.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 11656454021617 in words is "eleven trillion, six hundred fifty-six billion, four hundred fifty-four million, twenty-one thousand, six hundred seventeen".