11656401463161 has 48 divisors (see below), whose sum is σ = 20738720830464. Its totient is φ = 6143616243072.

The previous prime is 11656401463103. The next prime is 11656401463211. The reversal of 11656401463161 is 16136410465611.

11656401463161 is a `hidden beast` number, since 1 + 1 + 6 + 5 + 6 + 4 + 0 + 1 + 4 + 631 + 6 + 1 = 666.

It is not a de Polignac number, because 11656401463161 - 2⁹ = 11656401462649 is a prime.

It is a super-2 number, since 2×11656401463161² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11656401463261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4526761 + ... + 6618486.

It is an arithmetic number, because the mean of its divisors is an integer number (432056683968).

Almost surely, 2^{11656401463161} is an apocalyptic number.

It is an amenable number.

11656401463161 is a deficient number, since it is larger than the sum of its proper divisors (9082319367303).

11656401463161 is a wasteful number, since it uses less digits than its factorization.

11656401463161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11146550 (or 11146547 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 11656401463161 in words is "eleven trillion, six hundred fifty-six billion, four hundred one million, four hundred sixty-three thousand, one hundred sixty-one".