12159374578 has 12 divisors (see below), whose sum is σ = 19749990618. Its totient is φ = 5612018880.

The previous prime is 12159374561. The next prime is 12159374597. The reversal of 12159374578 is 87547395121.

It can be written as a sum of positive squares in 3 ways, for example, as 3231581409 + 8927793169 = 56847^2 + 94487^2 .

It is a super-2 number, since 2×12159374578² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17986903 + ... + 17987578.

Almost surely, 2^12159374578 is an apocalyptic number.

12159374578 is a deficient number, since it is larger than the sum of its proper divisors (7590616040).

12159374578 is a wasteful number, since it uses less digits than its factorization.

12159374578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35974509 (or 35974496 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 52.

The spelling of 12159374578 in words is "twelve billion, one hundred fifty-nine million, three hundred seventy-four thousand, five hundred seventy-eight".