15501616560 has 240 divisors, whose sum is σ = 52941549024. Its totient is φ = 4064329728.

The previous prime is 15501616541. The next prime is 15501616561. The reversal of 15501616560 is 6561610551.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (15501616561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12081679 + ... + 12082961.

Almost surely, 2^15501616560 is an apocalyptic number.

15501616560 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 15501616560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26470774512).

15501616560 is an abundant number, since it is smaller than the sum of its proper divisors (37439932464).

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

15501616560 is a wasteful number, since it uses less digits than its factorization.

15501616560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 15501616560 in words is "fifteen billion, five hundred one million, six hundred sixteen thousand, five hundred sixty".