11999939976 has 96 divisors (see below), whose sum is σ = 32809795200. Its totient is φ = 3962008320.

The previous prime is 11999939929. The next prime is 11999939977. The reversal of 11999939976 is 67993999911.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (11999939977) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3737860 + ... + 3741068.

It is an arithmetic number, because the mean of its divisors is an integer number (341768700).

Almost surely, 2^11999939976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11999939976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16404897600).

11999939976 is an abundant number, since it is smaller than the sum of its proper divisors (20809855224).

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

11999939976 is a wasteful number, since it uses less digits than its factorization.

11999939976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699 (or 3692 counting only the distinct ones).

The product of its digits is 66961566, while the sum is 72.

The spelling of 11999939976 in words is "eleven billion, nine hundred ninety-nine million, nine hundred thirty-nine thousand, nine hundred seventy-six".