11976707871 has 20 divisors (see below), whose sum is σ = 17895124632. Its totient is φ = 7982689968.

The previous prime is 11976707861. The next prime is 11976707929. The reversal of 11976707871 is 17870767911.

It is not a de Polignac number, because 11976707871 - 2²³ = 11968319263 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11976707801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 419281 + ... + 446933.

Almost surely, 2^11976707871 is an apocalyptic number.

11976707871 is a deficient number, since it is larger than the sum of its proper divisors (5918416761).

11976707871 is an equidigital number, since it uses as much as digits as its factorization.

11976707871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33012 (or 33003 counting only the distinct ones).

The product of its (nonzero) digits is 1037232, while the sum is 54.

The spelling of 11976707871 in words is "eleven billion, nine hundred seventy-six million, seven hundred seven thousand, eight hundred seventy-one".