15965790720 has 320 divisors, whose sum is σ = 58961333376. Its totient is φ = 3642490880.

The previous prime is 15965790719. The next prime is 15965790727. The reversal of 15965790720 is 2709756951.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (15965790727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1430602 + ... + 1441718.

Almost surely, 2^15965790720 is an apocalyptic number.

15965790720 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 15965790720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29480666688).

15965790720 is an abundant number, since it is smaller than the sum of its proper divisors (42995542656).

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

15965790720 is a wasteful number, since it uses less digits than its factorization.

15965790720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11171 (or 11155 counting only the distinct ones).

The product of its (nonzero) digits is 1190700, while the sum is 51.

The spelling of 15965790720 in words is "fifteen billion, nine hundred sixty-five million, seven hundred ninety thousand, seven hundred twenty".