15745275720 has 320 divisors, whose sum is σ = 55575590400. Its totient is φ = 3992924160.

The previous prime is 15745275703. The next prime is 15745275727. The reversal of 15745275720 is 2757254751.

15745275720 is a `hidden beast` number, since 1 + 5 + 74 + 5 + 2 + 7 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (15745275727) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5924632 + ... + 5927288.

It is an arithmetic number, because the mean of its divisors is an integer number (173673720).

Almost surely, 2^15745275720 is an apocalyptic number.

15745275720 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 15745275720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27787795200).

15745275720 is an abundant number, since it is smaller than the sum of its proper divisors (39830314680).

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

15745275720 is a wasteful number, since it uses less digits than its factorization.

15745275720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 686000, while the sum is 45.

The spelling of 15745275720 in words is "fifteen billion, seven hundred forty-five million, two hundred seventy-five thousand, seven hundred twenty".