15170109889 has 9 divisors (see below), whose sum is σ = 16676072931. Its totient is φ = 13789777320.

The previous prime is 15170109887. The next prime is 15170109907. The reversal of 15170109889 is 98890107151.

It is a happy number.

The square root of 15170109889 is 123167.

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., 3482770225 + 11687339664 = 59015^2 + 108108^2 .

It is not a de Polignac number, because 15170109889 - 2¹ = 15170109887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15170109881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1349239 + ... + 1360435.

Almost surely, 2^15170109889 is an apocalyptic number.

15170109889 is the 123167-th square number.

15170109889 is the 61584-th centered octagonal number.

It is an amenable number.

15170109889 is a deficient number, since it is larger than the sum of its proper divisors (1505963042).

15170109889 is an frugal number, since it uses more digits than its factorization.

15170109889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22416 (or 11208 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 49.

Multiplying 15170109889 by its sum of digits (49), we get a square (743335384561 = 862169²).

The spelling of 15170109889 in words is "fifteen billion, one hundred seventy million, one hundred nine thousand, eight hundred eighty-nine".