11947909904 has 30 divisors (see below), whose sum is σ = 26928518094. Its totient is φ = 5120532480.

The previous prime is 11947909879. The next prime is 11947910003. The reversal of 11947909904 is 40990974911.

It can be written as a sum of positive squares in only one way, i.e., 6684697600 + 5263212304 = 81760^2 + 72548^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7619057 + ... + 7620624.

Almost surely, 2^11947909904 is an apocalyptic number.

11947909904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11947909904 is an abundant number, since it is smaller than the sum of its proper divisors (14980608190).

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

11947909904 is a wasteful number, since it uses less digits than its factorization.

11947909904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15239703 (or 15239690 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 11947909904 in words is "eleven billion, nine hundred forty-seven million, nine hundred nine thousand, nine hundred four".