12496977578 has 16 divisors (see below), whose sum is σ = 19735816320. Its totient is φ = 5918497056.

The previous prime is 12496977539. The next prime is 12496977589. The reversal of 12496977578 is 87577969421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192350 + ... + 248982.

It is an arithmetic number, because the mean of its divisors is an integer number (1233488520).

Almost surely, 2^12496977578 is an apocalyptic number.

12496977578 is a deficient number, since it is larger than the sum of its proper divisors (7238838742).

12496977578 is a wasteful number, since it uses less digits than its factorization.

12496977578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62461.

The product of its digits is 53343360, while the sum is 65.

The spelling of 12496977578 in words is "twelve billion, four hundred ninety-six million, nine hundred seventy-seven thousand, five hundred seventy-eight".