11979644976 has 120 divisors (see below), whose sum is σ = 36540796656. Its totient is φ = 3641587200.

The previous prime is 11979644969. The next prime is 11979644977. The reversal of 11979644976 is 67944697911.

11979644976 is a `hidden beast` number, since 1 + 19 + 79 + 64 + 497 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (11979644977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116826 + ... + 193926.

Almost surely, 2^11979644976 is an apocalyptic number.

11979644976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11979644976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18270398328).

11979644976 is an abundant number, since it is smaller than the sum of its proper divisors (24561151680).

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

11979644976 is a wasteful number, since it uses less digits than its factorization.

11979644976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77211 (or 77202 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 11979644976 in words is "eleven billion, nine hundred seventy-nine million, six hundred forty-four thousand, nine hundred seventy-six".