12587491539 has 24 divisors (see below), whose sum is σ = 20838927200. Its totient is φ = 7172229888.

The previous prime is 12587491537. The next prime is 12587491561. The reversal of 12587491539 is 93519478521.

It is a happy number.

12587491539 is a `hidden beast` number, since 1 + 2 + 587 + 4 + 9 + 1 + 53 + 9 = 666.

It is not a de Polignac number, because 12587491539 - 2¹ = 12587491537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12587491531) 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, 264262 + ... + 308235.

Almost surely, 2^12587491539 is an apocalyptic number.

12587491539 is a deficient number, since it is larger than the sum of its proper divisors (8251435661).

12587491539 is a wasteful number, since it uses less digits than its factorization.

12587491539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572859 (or 572856 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 12587491539 in words is "twelve billion, five hundred eighty-seven million, four hundred ninety-one thousand, five hundred thirty-nine".