15725041920 has 720 divisors, whose sum is σ = 65815884288. Its totient is φ = 3510190080.

The previous prime is 15725041897. The next prime is 15725041951. The reversal of 15725041920 is 2914052751.

15725041920 is a `hidden beast` number, since 1 + 572 + 50 + 4 + 19 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 34110490 + ... + 34110950.

Almost surely, 2^15725041920 is an apocalyptic number.

15725041920 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 15725041920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32907942144).

15725041920 is an abundant number, since it is smaller than the sum of its proper divisors (50090842368).

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

15725041920 is an equidigital number, since it uses as much as digits as its factorization.

15725041920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 15725041920 in words is "fifteen billion, seven hundred twenty-five million, forty-one thousand, nine hundred twenty".