8961572475520 has 256 divisors, whose sum is σ = 24594656486400. Its totient is φ = 3058709299200.

The previous prime is 8961572475509. The next prime is 8961572475593. The reversal of 8961572475520 is 255742751698.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2089429536 + ... + 2089433824.

It is an arithmetic number, because the mean of its divisors is an integer number (96072876900).

Almost surely, 2^{8961572475520} is an apocalyptic number.

8961572475520 is a gapful number since it is divisible by the number (80) 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 8961572475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12297328243200).

8961572475520 is an abundant number, since it is smaller than the sum of its proper divisors (15633084010880).

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

8961572475520 is a wasteful number, since it uses less digits than its factorization.

8961572475520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6307 (or 6295 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 61.

The spelling of 8961572475520 in words is "eight trillion, nine hundred sixty-one billion, five hundred seventy-two million, four hundred seventy-five thousand, five hundred twenty".