25172743259097 has 80 divisors (see below), whose sum is σ = 45310897568640. Its totient is φ = 13605259675392.

The previous prime is 25172743259089. The next prime is 25172743259179. The reversal of 25172743259097 is 79095234727152.

It is a happy number.

25172743259097 is a `hidden beast` number, since 2 + 5 + 1 + 7 + 2 + 7 + 4 + 32 + 590 + 9 + 7 = 666.

It is not a de Polignac number, because 25172743259097 - 2³ = 25172743259089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (25172743059097) 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, 4753383 + ... + 8540499.

It is an arithmetic number, because the mean of its divisors is an integer number (566386219608).

Almost surely, 2^{25172743259097} is an apocalyptic number.

25172743259097 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25172743259097 is a deficient number, since it is larger than the sum of its proper divisors (20138154309543).

25172743259097 is a wasteful number, since it uses less digits than its factorization.

25172743259097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787772 (or 3787763 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 25172743259097 in words is "twenty-five trillion, one hundred seventy-two billion, seven hundred forty-three million, two hundred fifty-nine thousand, ninety-seven".