25865529157897 has 32 divisors (see below), whose sum is σ = 30484460160000. Its totient is φ = 21636174181440.

The previous prime is 25865529157883. The next prime is 25865529157901. The reversal of 25865529157897 is 79875192556852.

It is a de Polignac number, because none of the positive numbers 2^k-25865529157897 is a prime.

It is a super-3 number, since 3×25865529157897³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25865529157297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56218854 + ... + 56677072.

It is an arithmetic number, because the mean of its divisors is an integer number (952639380000).

Almost surely, 2^{25865529157897} is an apocalyptic number.

It is an amenable number.

25865529157897 is a deficient number, since it is larger than the sum of its proper divisors (4618931002103).

25865529157897 is a wasteful number, since it uses less digits than its factorization.

25865529157897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459501.

The product of its digits is 3810240000, while the sum is 79.

The spelling of 25865529157897 in words is "twenty-five trillion, eight hundred sixty-five billion, five hundred twenty-nine million, one hundred fifty-seven thousand, eight hundred ninety-seven".