15680729516 has 12 divisors (see below), whose sum is σ = 27771895032. Its totient is φ = 7745902368.

The previous prime is 15680729509. The next prime is 15680729531. The reversal of 15680729516 is 61592708651.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23615225 + ... + 23615888.

It is an arithmetic number, because the mean of its divisors is an integer number (2314324586).

Almost surely, 2^15680729516 is an apocalyptic number.

It is an amenable number.

15680729516 is a deficient number, since it is larger than the sum of its proper divisors (12091165516).

15680729516 is a wasteful number, since it uses less digits than its factorization.

15680729516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47231200 (or 47231198 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 15680729516 in words is "fifteen billion, six hundred eighty million, seven hundred twenty-nine thousand, five hundred sixteen".