11999539552 has 192 divisors, whose sum is σ = 32035820544. Its totient is φ = 4272445440.

The previous prime is 11999539511. The next prime is 11999539579. The reversal of 11999539552 is 25593599911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3297478 + ... + 3301114.

It is an arithmetic number, because the mean of its divisors is an integer number (166853232).

Almost surely, 2^11999539552 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 11999539552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16017910272).

11999539552 is an abundant number, since it is smaller than the sum of its proper divisors (20036280992).

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

11999539552 is a wasteful number, since it uses less digits than its factorization.

11999539552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781 (or 3773 counting only the distinct ones).

The product of its digits is 4920750, while the sum is 58.

The spelling of 11999539552 in words is "eleven billion, nine hundred ninety-nine million, five hundred thirty-nine thousand, five hundred fifty-two".