11656005996 has 12 divisors (see below), whose sum is σ = 27197347352. Its totient is φ = 3885335328.

The previous prime is 11656005967. The next prime is 11656005997. The reversal of 11656005996 is 69950065611.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (11656005997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485666905 + ... + 485666928.

Almost surely, 2^11656005996 is an apocalyptic number.

It is an amenable number.

11656005996 is an abundant number, since it is smaller than the sum of its proper divisors (15541341356).

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

11656005996 is a wasteful number, since it uses less digits than its factorization.

11656005996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971333840 (or 971333838 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 48.

The spelling of 11656005996 in words is "eleven billion, six hundred fifty-six million, five thousand, nine hundred ninety-six".