12715342778 has 16 divisors (see below), whose sum is σ = 19529141280. Its totient is φ = 6205819536.

The previous prime is 12715342771. The next prime is 12715342799. The reversal of 12715342778 is 87724351721.

It is not an unprimeable number, because it can be changed into a prime (12715342771) 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, 88976 + ... + 182612.

It is an arithmetic number, because the mean of its divisors is an integer number (1220571330).

Almost surely, 2^12715342778 is an apocalyptic number.

12715342778 is a deficient number, since it is larger than the sum of its proper divisors (6813798502).

12715342778 is a wasteful number, since it uses less digits than its factorization.

12715342778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95261.

The product of its digits is 658560, while the sum is 47.

The spelling of 12715342778 in words is "twelve billion, seven hundred fifteen million, three hundred forty-two thousand, seven hundred seventy-eight".