12915961278 has 16 divisors (see below), whose sum is σ = 28180279296. Its totient is φ = 3913927640.

The previous prime is 12915961277. The next prime is 12915961301. The reversal of 12915961278 is 87216951921.

It is a self number, because there is not a number n which added to its sum of digits gives 12915961278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915961271) 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, 97848126 + ... + 97848257.

It is an arithmetic number, because the mean of its divisors is an integer number (1761267456).

Almost surely, 2^12915961278 is an apocalyptic number.

12915961278 is an abundant number, since it is smaller than the sum of its proper divisors (15264318018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12915961278 is a wasteful number, since it uses less digits than its factorization.

12915961278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195696399.

The product of its digits is 544320, while the sum is 51.

The spelling of 12915961278 in words is "twelve billion, nine hundred fifteen million, nine hundred sixty-one thousand, two hundred seventy-eight".