15068997689 has 16 divisors (see below), whose sum is σ = 15789937296. Its totient is φ = 14367974400.

The previous prime is 15068997631. The next prime is 15068997707. The reversal of 15068997689 is 98679986051.

It can be written as a sum of positive squares in 8 ways, for example, as 11536478464 + 3532519225 = 107408^2 + 59435^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15068997689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15068997389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373469 + ... + 411845.

It is an arithmetic number, because the mean of its divisors is an integer number (986871081).

Almost surely, 2^15068997689 is an apocalyptic number.

It is an amenable number.

15068997689 is a deficient number, since it is larger than the sum of its proper divisors (720939607).

15068997689 is a wasteful number, since it uses less digits than its factorization.

15068997689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38636.

The product of its (nonzero) digits is 58786560, while the sum is 68.

The spelling of 15068997689 in words is "fifteen billion, sixty-eight million, nine hundred ninety-seven thousand, six hundred eighty-nine".