15174398257489 has 3 divisors (see below), whose sum is σ = 15174402152923. Its totient is φ = 15174394362056.

The previous prime is 15174398257357. The next prime is 15174398257523. The reversal of 15174398257489 is 98475289347151.

The square root of 15174398257489 is 3895433.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 15132294500625 + 42103756864 = 3890025^2 + 205192^2 .

It is not a de Polignac number, because 15174398257489 - 2²⁷ = 15174264039761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15174398257289) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1947717 + ... + 5843149.

Almost surely, 2^{15174398257489} is an apocalyptic number.

15174398257489 is the 3895433-rd square number.

15174398257489 is the 1947717-th centered octagonal number.

It is an amenable number.

15174398257489 is a deficient number, since it is larger than the sum of its proper divisors (3895434).

15174398257489 is an frugal number, since it uses more digits than its factorization.

15174398257489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7790866 (or 3895433 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 73.

The spelling of 15174398257489 in words is "fifteen trillion, one hundred seventy-four billion, three hundred ninety-eight million, two hundred fifty-seven thousand, four hundred eighty-nine".