9725657324816 has 20 divisors (see below), whose sum is σ = 18844146117324. Its totient is φ = 4862651875200.

The previous prime is 9725657324813. The next prime is 9725657324819. The reversal of 9725657324816 is 6184237565279.

It is an interprime number because it is at equal distance from previous prime (9725657324813) and next prime (9725657324819).

It can be written as a sum of positive squares in 2 ways, for example, as 6254500810000 + 3471156514816 = 2500900^2 + 1863104^2 .

It is a super-2 number, since 2×9725657324816² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9725657324813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10594775 + ... + 11476086.

Almost surely, 2^{9725657324816} is an apocalyptic number.

It is an amenable number.

9725657324816 is a deficient number, since it is larger than the sum of its proper divisors (9118488792508).

9725657324816 is a wasteful number, since it uses less digits than its factorization.

9725657324816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22098410 (or 22098404 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 65.

The spelling of 9725657324816 in words is "nine trillion, seven hundred twenty-five billion, six hundred fifty-seven million, three hundred twenty-four thousand, eight hundred sixteen".