15489793764 has 27 divisors (see below), whose sum is σ = 39156644163. Its totient is φ = 5163015672.

The previous prime is 15489793733. The next prime is 15489793771. The reversal of 15489793764 is 46739798451.

The square root of 15489793764 is 124458.

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

15489793764 is a `hidden beast` number, since 1 + 5 + 489 + 7 + 93 + 7 + 64 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 736377 + ... + 757119.

Almost surely, 2^15489793764 is an apocalyptic number.

15489793764 is the 124458-th square number.

It is an amenable number.

15489793764 is an abundant number, since it is smaller than the sum of its proper divisors (23666850399).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15489793764 is an frugal number, since it uses more digits than its factorization.

15489793764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41496 (or 20748 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 15489793764 in words is "fifteen billion, four hundred eighty-nine million, seven hundred ninety-three thousand, seven hundred sixty-four".