9725518522564 has 48 divisors (see below), whose sum is σ = 18801300526848. Its totient is φ = 4373843044608.

The previous prime is 9725518522561. The next prime is 9725518522589. The reversal of 9725518522564 is 4652258155279.

It is not an unprimeable number, because it can be changed into a prime (9725518522561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8210289 + ... + 9319864.

It is an arithmetic number, because the mean of its divisors is an integer number (391693760976).

Almost surely, 2^{9725518522564} is an apocalyptic number.

9725518522564 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

9725518522564 is a deficient number, since it is larger than the sum of its proper divisors (9075782004284).

9725518522564 is a wasteful number, since it uses less digits than its factorization.

9725518522564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530444 (or 17530442 counting only the distinct ones).

The product of its digits is 60480000, while the sum is 61.

The spelling of 9725518522564 in words is "nine trillion, seven hundred twenty-five billion, five hundred eighteen million, five hundred twenty-two thousand, five hundred sixty-four".