8109257105125 has 64 divisors (see below), whose sum is σ = 11892028981248. Its totient is φ = 5459246760000.

The previous prime is 8109257105111. The next prime is 8109257105227. The reversal of 8109257105125 is 5215017529018.

It is a happy number.

It is not a de Polignac number, because 8109257105125 - 2⁷ = 8109257104997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3155419 + ... + 5116168.

It is an arithmetic number, because the mean of its divisors is an integer number (185812952832).

Almost surely, 2^{8109257105125} is an apocalyptic number.

It is an amenable number.

8109257105125 is a deficient number, since it is larger than the sum of its proper divisors (3782771876123).

8109257105125 is a wasteful number, since it uses less digits than its factorization.

8109257105125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271667 (or 8271657 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 46.

The spelling of 8109257105125 in words is "eight trillion, one hundred nine billion, two hundred fifty-seven million, one hundred five thousand, one hundred twenty-five".