11987501292 has 72 divisors (see below), whose sum is σ = 33185814480. Its totient is φ = 3625937280.

The previous prime is 11987501287. The next prime is 11987501303. The reversal of 11987501292 is 29210578911.

11987501292 is a `hidden beast` number, since 119 + 8 + 7 + 501 + 29 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189459 + ... + 244682.

It is an arithmetic number, because the mean of its divisors is an integer number (460914090).

Almost surely, 2^11987501292 is an apocalyptic number.

11987501292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11987501292 is an abundant number, since it is smaller than the sum of its proper divisors (21198313188).

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

11987501292 is a wasteful number, since it uses less digits than its factorization.

11987501292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434223 (or 434218 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 11987501292 in words is "eleven billion, nine hundred eighty-seven million, five hundred one thousand, two hundred ninety-two".