15015000000 has 896 divisors, whose sum is σ = 66674829312. Its totient is φ = 2880000000.

The previous prime is 15014999977. The next prime is 15015000031. The reversal of 15015000000 is 51051.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 15015000000.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 3250 × 1650 × 2800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1154999994 + ... + 1155000006.

It is an arithmetic number, because the mean of its divisors is an integer number (74413872).

Almost surely, 2^15015000000 is an apocalyptic number.

15015000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15015000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33337414656).

15015000000 is an abundant number, since it is smaller than the sum of its proper divisors (51659829312).

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

15015000000 is an frugal number, since it uses more digits than its factorization.

15015000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 12.

Adding to 15015000000 its reverse (51051), we get a palindrome (15015051051).

The spelling of 15015000000 in words is "fifteen billion, fifteen million", and thus it is an aban number and an uban number.