15131278768 has 40 divisors (see below), whose sum is σ = 29831907600. Its totient is φ = 7432879104.

The previous prime is 15131278711. The next prime is 15131278781. The reversal of 15131278768 is 86787213151.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1968180 + ... + 1975852.

It is an arithmetic number, because the mean of its divisors is an integer number (745797690).

Almost surely, 2^15131278768 is an apocalyptic number.

It is an amenable number.

15131278768 is a deficient number, since it is larger than the sum of its proper divisors (14700628832).

15131278768 is a wasteful number, since it uses less digits than its factorization.

15131278768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9829 (or 9823 counting only the distinct ones).

The product of its digits is 564480, while the sum is 49.

The spelling of 15131278768 in words is "fifteen billion, one hundred thirty-one million, two hundred seventy-eight thousand, seven hundred sixty-eight".