12539385896 has 8 divisors (see below), whose sum is σ = 23511348570. Its totient is φ = 6269692944.

The previous prime is 12539385841. The next prime is 12539385917. The reversal of 12539385896 is 69858393521.

It can be written as a sum of positive squares in only one way, i.e., 11571304900 + 968080996 = 107570^2 + 31114^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783711611 + ... + 783711626.

Almost surely, 2^12539385896 is an apocalyptic number.

It is an amenable number.

12539385896 is a deficient number, since it is larger than the sum of its proper divisors (10971962674).

12539385896 is a wasteful number, since it uses less digits than its factorization.

12539385896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567423243 (or 1567423239 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 59.

The spelling of 12539385896 in words is "twelve billion, five hundred thirty-nine million, three hundred eighty-five thousand, eight hundred ninety-six".