11836656513 has 12 divisors (see below), whose sum is σ = 18651701328. Its totient is φ = 7173731160.

The previous prime is 11836656509. The next prime is 11836656529. The reversal of 11836656513 is 31565663811.

11836656513 is a `hidden beast` number, since 1 + 1 + 83 + 6 + 6 + 56 + 513 = 666.

It is not a de Polignac number, because 11836656513 - 2² = 11836656509 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11836656593) 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, 59780995 + ... + 59781192.

It is an arithmetic number, because the mean of its divisors is an integer number (1554308444).

Almost surely, 2^11836656513 is an apocalyptic number.

It is an amenable number.

11836656513 is a deficient number, since it is larger than the sum of its proper divisors (6815044815).

11836656513 is a wasteful number, since it uses less digits than its factorization.

11836656513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119562204 (or 119562201 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 11836656513 in words is "eleven billion, eight hundred thirty-six million, six hundred fifty-six thousand, five hundred thirteen".