15813062500 has 63 divisors (see below), whose sum is σ = 34659536821. Its totient is φ = 6312650000.

The previous prime is 15813062497. The next prime is 15813062549. The reversal of 15813062500 is 526031851.

The square root of 15813062500 is 125750.

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

15813062500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 13853760804 + 1959301696 = 117702^2 + 44264^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 31437249 + ... + 31437751.

Almost surely, 2^15813062500 is an apocalyptic number.

15813062500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15813062500 is the 125750-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15813062500

15813062500 is an abundant number, since it is smaller than the sum of its proper divisors (18846474321).

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

15813062500 is an frugal number, since it uses more digits than its factorization.

15813062500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 15813062500 in words is "fifteen billion, eight hundred thirteen million, sixty-two thousand, five hundred".