11989979640000 has 2940 divisors, whose sum is σ = 50557001724504. Its totient is φ = 2808317952000.

The previous prime is 11989979639993. The next prime is 11989979640029. The reversal of 11989979640000 is 4697998911.

It is a super-2 number, since 2×11989979640000² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11989979640000.

It is an unprimeable number.

It is a polite number, since it can be written in 419 ways as a sum of consecutive naturals, for example, 178954919967 + ... + 178954920033.

Almost surely, 2^{11989979640000} is an apocalyptic number.

11989979640000 is a gapful number since it is divisible by the number (10) 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 11989979640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25278500862252).

11989979640000 is an abundant number, since it is smaller than the sum of its proper divisors (38567022084504).

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

11989979640000 is an frugal number, since it uses more digits than its factorization.

11989979640000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 63.

The spelling of 11989979640000 in words is "eleven trillion, nine hundred eighty-nine billion, nine hundred seventy-nine million, six hundred forty thousand".