11979995250 has 32 divisors (see below), whose sum is σ = 29902070016. Its totient is φ = 3194665200.

The previous prime is 11979995243. The next prime is 11979995281. The reversal of 11979995250 is 5259997911.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7985914 + ... + 7987413.

It is an arithmetic number, because the mean of its divisors is an integer number (934439688).

Almost surely, 2^11979995250 is an apocalyptic number.

11979995250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11979995250 is an abundant number, since it is smaller than the sum of its proper divisors (17922074766).

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

11979995250 is a wasteful number, since it uses less digits than its factorization.

11979995250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15973347 (or 15973337 counting only the distinct ones).

The product of its (nonzero) digits is 2296350, while the sum is 57.

The spelling of 11979995250 in words is "eleven billion, nine hundred seventy-nine million, nine hundred ninety-five thousand, two hundred fifty".