15189823009 has 9 divisors (see below), whose sum is σ = 15616142451. Its totient is φ = 14774850360.

The previous prime is 15189822937. The next prime is 15189823013. The reversal of 15189823009 is 90032898151.

The square root of 15189823009 is 123247.

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., 13592062225 + 1597760784 = 116585^2 + 39972^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15189823009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15189823009.

It is not an unprimeable number, because it can be changed into a prime (15189829009) 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, 4558474 + ... + 4561804.

It is an arithmetic number, because the mean of its divisors is an integer number (1735126939).

Almost surely, 2^15189823009 is an apocalyptic number.

15189823009 is the 123247-th square number.

15189823009 is the 61624-th centered octagonal number.

It is an amenable number.

15189823009 is a deficient number, since it is larger than the sum of its proper divisors (426319442).

15189823009 is an frugal number, since it uses more digits than its factorization.

15189823009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736 (or 3368 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 15189823009 in words is "fifteen billion, one hundred eighty-nine million, eight hundred twenty-three thousand, nine".