15723643560 has 128 divisors (see below), whose sum is σ = 48223486080. Its totient is φ = 4099949568.

The previous prime is 15723643493. The next prime is 15723643561. The reversal of 15723643560 is 6534632751.

It is not an unprimeable number, because it can be changed into a prime (15723643561) 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, 1948494 + ... + 1956546.

It is an arithmetic number, because the mean of its divisors is an integer number (376745985).

Almost surely, 2^15723643560 is an apocalyptic number.

15723643560 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 15723643560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24111743040).

15723643560 is an abundant number, since it is smaller than the sum of its proper divisors (32499842520).

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

15723643560 is a wasteful number, since it uses less digits than its factorization.

15723643560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8427 (or 8423 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The spelling of 15723643560 in words is "fifteen billion, seven hundred twenty-three million, six hundred forty-three thousand, five hundred sixty".