11700012978 has 32 divisors (see below), whose sum is σ = 26093925120. Its totient is φ = 3885919920.

The previous prime is 11700012959. The next prime is 11700013007. The reversal of 11700012978 is 87921000711.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376138 + ... + 406053.

It is an arithmetic number, because the mean of its divisors is an integer number (815435160).

Almost surely, 2^11700012978 is an apocalyptic number.

11700012978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11700012978 is an abundant number, since it is smaller than the sum of its proper divisors (14393912142).

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

11700012978 is a wasteful number, since it uses less digits than its factorization.

11700012978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782479 (or 782473 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The spelling of 11700012978 in words is "eleven billion, seven hundred million, twelve thousand, nine hundred seventy-eight".