11947839516 has 36 divisors (see below), whose sum is σ = 30208614072. Its totient is φ = 3981672864.

The previous prime is 11947839499. The next prime is 11947839523. The reversal of 11947839516 is 61593874911.

11947839516 is a `hidden beast` number, since 1 + 1 + 9 + 47 + 83 + 9 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×11947839516² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124815 + ... + 198681.

Almost surely, 2^11947839516 is an apocalyptic number.

It is an amenable number.

11947839516 is an abundant number, since it is smaller than the sum of its proper divisors (18260774556).

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

11947839516 is a wasteful number, since it uses less digits than its factorization.

11947839516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78370 (or 78365 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The spelling of 11947839516 in words is "eleven billion, nine hundred forty-seven million, eight hundred thirty-nine thousand, five hundred sixteen".