15731044992 has 320 divisors, whose sum is σ = 50868787200. Its totient is φ = 4796983296.

The previous prime is 15731044969. The next prime is 15731045009. The reversal of 15731044992 is 29944013751.

15731044992 is a `hidden beast` number, since 1 + 57 + 3 + 104 + 499 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17117109 + ... + 17118027.

It is an arithmetic number, because the mean of its divisors is an integer number (158964960).

Almost surely, 2^15731044992 is an apocalyptic number.

15731044992 is a gapful number since it is divisible by the number (12) 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 15731044992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25434393600).

15731044992 is an abundant number, since it is smaller than the sum of its proper divisors (35137742208).

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

15731044992 is a wasteful number, since it uses less digits than its factorization.

15731044992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 15731044992 in words is "fifteen billion, seven hundred thirty-one million, forty-four thousand, nine hundred ninety-two".