12456528539 has 8 divisors (see below), whose sum is σ = 15331112160. Its totient is φ = 9855714816.

The previous prime is 12456528533. The next prime is 12456528559. The reversal of 12456528539 is 93582565421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12456528539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12456528533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68442374 + ... + 68442555.

It is an arithmetic number, because the mean of its divisors is an integer number (1916389020).

Almost surely, 2^12456528539 is an apocalyptic number.

12456528539 is a deficient number, since it is larger than the sum of its proper divisors (2874583621).

12456528539 is a wasteful number, since it uses less digits than its factorization.

12456528539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136884949.

The product of its digits is 2592000, while the sum is 50.

The spelling of 12456528539 in words is "twelve billion, four hundred fifty-six million, five hundred twenty-eight thousand, five hundred thirty-nine".