8729656345125 has 80 divisors (see below), whose sum is σ = 16982260618752. Its totient is φ = 4453389784800.

The previous prime is 8729656345121. The next prime is 8729656345159. The reversal of 8729656345125 is 5215436569278.

8729656345125 is a `hidden beast` number, since 8 + 7 + 2 + 9 + 6 + 563 + 45 + 1 + 25 = 666.

It is not a de Polignac number, because 8729656345125 - 2² = 8729656345121 is a prime.

It is a super-2 number, since 2×8729656345125² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8729656345121) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18510349 + ... + 18976098.

Almost surely, 2^{8729656345125} is an apocalyptic number.

It is an amenable number.

8729656345125 is a deficient number, since it is larger than the sum of its proper divisors (8252604273627).

8729656345125 is a wasteful number, since it uses less digits than its factorization.

8729656345125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37486497 (or 37486478 counting only the distinct ones).

The product of its digits is 108864000, while the sum is 63.

The spelling of 8729656345125 in words is "eight trillion, seven hundred twenty-nine billion, six hundred fifty-six million, three hundred forty-five thousand, one hundred twenty-five".