11656234512 has 60 divisors (see below), whose sum is σ = 35130601324. Its totient is φ = 3586533120.

The previous prime is 11656234511. The next prime is 11656234517. The reversal of 11656234512 is 21543265611.

11656234512 is a `hidden beast` number, since 1 + 16 + 5 + 623 + 4 + 5 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1716942096 + 9939292416 = 41436^2 + 99696^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11656234511) 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, 3111439 + ... + 3115182.

Almost surely, 2^11656234512 is an apocalyptic number.

11656234512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11656234512 is an abundant number, since it is smaller than the sum of its proper divisors (23474366812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11656234512 is a wasteful number, since it uses less digits than its factorization.

11656234512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6226648 (or 6226639 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 11656234512 in words is "eleven billion, six hundred fifty-six million, two hundred thirty-four thousand, five hundred twelve".