12503180978 has 18 divisors (see below), whose sum is σ = 19927173213. Its totient is φ = 5882584800.

The previous prime is 12503180951. The next prime is 12503180999. The reversal of 12503180978 is 87908130521.

It can be written as a sum of positive squares in 2 ways, for example, as 11443222729 + 1059958249 = 106973^2 + 32557^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79067.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2685953 + ... + 2690603.

Almost surely, 2^12503180978 is an apocalyptic number.

12503180978 is a deficient number, since it is larger than the sum of its proper divisors (7423992235).

12503180978 is an frugal number, since it uses more digits than its factorization.

12503180978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338 (or 4670 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 12503180978 in words is "twelve billion, five hundred three million, one hundred eighty thousand, nine hundred seventy-eight".