11657699856 has 120 divisors (see below), whose sum is σ = 35937360576. Its totient is φ = 3498289920.

The previous prime is 11657699839. The next prime is 11657699897. The reversal of 11657699856 is 65899675611.

11657699856 is a `hidden beast` number, since 1 + 1 + 6 + 576 + 9 + 9 + 8 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 11657699793 and 11657699802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127426 + ... + 198878.

Almost surely, 2^11657699856 is an apocalyptic number.

11657699856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11657699856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17968680288).

11657699856 is an abundant number, since it is smaller than the sum of its proper divisors (24279660720).

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

11657699856 is a wasteful number, since it uses less digits than its factorization.

11657699856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71581 (or 71572 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 63.

The spelling of 11657699856 in words is "eleven billion, six hundred fifty-seven million, six hundred ninety-nine thousand, eight hundred fifty-six".