11656446645 has 16 divisors (see below), whose sum is σ = 18701141760. Its totient is φ = 6199829184.

The previous prime is 11656446563. The next prime is 11656446647. The reversal of 11656446645 is 54664465611.

It is not a de Polignac number, because 11656446645 - 2¹⁹ = 11655922357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11656446594 and 11656446603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656446647) 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, 1053210 + ... + 1064219.

It is an arithmetic number, because the mean of its divisors is an integer number (1168821360).

Almost surely, 2^11656446645 is an apocalyptic number.

11656446645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11656446645 is a deficient number, since it is larger than the sum of its proper divisors (7044695115).

11656446645 is a wasteful number, since it uses less digits than its factorization.

11656446645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117804.

The product of its digits is 2073600, while the sum is 48.

The spelling of 11656446645 in words is "eleven billion, six hundred fifty-six million, four hundred forty-six thousand, six hundred forty-five".