15616751089 has 9 divisors (see below), whose sum is σ = 16591677771. Its totient is φ = 14696119200.

The previous prime is 15616751039. The next prime is 15616751131. The reversal of 15616751089 is 98015761651.

It is a happy number.

The square root of 15616751089 is 124967.

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

It can be written as a sum of positive squares in only one way, i.e., 12158370225 + 3458380864 = 110265^2 + 58808^2 .

It is not a de Polignac number, because 15616751089 - 2⁹ = 15616750577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15616751039) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 2120764 + ... + 2128114.

Almost surely, 2^15616751089 is an apocalyptic number.

15616751089 is the 124967-th square number.

15616751089 is the 62484-th centered octagonal number.

It is an amenable number.

15616751089 is a deficient number, since it is larger than the sum of its proper divisors (974926682).

15616751089 is an frugal number, since it uses more digits than its factorization.

15616751089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14736 (or 7368 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 49.

Multiplying 15616751089 by its sum of digits (49), we get a square (765220803361 = 874769²).

The spelling of 15616751089 in words is "fifteen billion, six hundred sixteen million, seven hundred fifty-one thousand, eighty-nine".