11996531229520 has 160 divisors (see below), whose sum is σ = 28843612890624. Its totient is φ = 4637755699200.

The previous prime is 11996531229499. The next prime is 11996531229587. The reversal of 11996531229520 is 2592213569911.

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, 250996825 + ... + 251044615.

Almost surely, 2^{11996531229520} is an apocalyptic number.

11996531229520 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 11996531229520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14421806445312).

11996531229520 is an abundant number, since it is smaller than the sum of its proper divisors (16847081661104).

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

11996531229520 is a wasteful number, since it uses less digits than its factorization.

11996531229520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48741 (or 48735 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 11996531229520 in words is "eleven trillion, nine hundred ninety-six billion, five hundred thirty-one million, two hundred twenty-nine thousand, five hundred twenty".