15157795689 has 9 divisors (see below), whose sum is σ = 21895127293. Its totient is φ = 10104950892.

The previous prime is 15157795687. The next prime is 15157795729. The reversal of 15157795689 is 98659775151.

The square root of 15157795689 is 123117.

It is a perfect power (a square), and thus also a powerful number.

15157795689 is a `hidden beast` number, since 1 + 5 + 1 + 577 + 9 + 56 + 8 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 15157795689 - 2¹ = 15157795687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15157795687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 348832 + ... + 389870.

Almost surely, 2^15157795689 is an apocalyptic number.

15157795689 is the 123117-th square number.

15157795689 is the 61559-th centered octagonal number.

It is an amenable number.

15157795689 is a deficient number, since it is larger than the sum of its proper divisors (6737331604).

15157795689 is an frugal number, since it uses more digits than its factorization.

15157795689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82084 (or 41042 counting only the distinct ones).

The product of its digits is 23814000, while the sum is 63.

The spelling of 15157795689 in words is "fifteen billion, one hundred fifty-seven million, seven hundred ninety-five thousand, six hundred eighty-nine".