15912000000 has 840 divisors, whose sum is σ = 65455177788. Its totient is φ = 3686400000.

The previous prime is 15911999981. The next prime is 15912000007. The reversal of 15912000000 is 21951.

It can be written as a sum of positive squares in 14 ways, for example, as 14411522304 + 1500477696 = 120048^2 + 38736^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15912000007) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 935999992 + ... + 936000008.

Almost surely, 2^15912000000 is an apocalyptic number.

15912000000 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 15912000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32727588894).

15912000000 is an abundant number, since it is smaller than the sum of its proper divisors (49543177788).

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

15912000000 is an frugal number, since it uses more digits than its factorization.

15912000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 15912000000 its reverse (21951), we get a palindrome (15912021951).

The spelling of 15912000000 in words is "fifteen billion, nine hundred twelve million", and thus it is an aban number.