25864657375 has 16 divisors (see below), whose sum is σ = 32721283296. Its totient is φ = 20408270400.

The previous prime is 25864657331. The next prime is 25864657381. The reversal of 25864657375 is 57375646852.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25864657375 is a prime.

It is a super-2 number, since 2×25864657375² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1408117 + ... + 1426366.

It is an arithmetic number, because the mean of its divisors is an integer number (2045080206).

Almost surely, 2^25864657375 is an apocalyptic number.

25864657375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25864657375 is a deficient number, since it is larger than the sum of its proper divisors (6856625921).

25864657375 is an equidigital number, since it uses as much as digits as its factorization.

25864657375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834571 (or 2834561 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 58.

The spelling of 25864657375 in words is "twenty-five billion, eight hundred sixty-four million, six hundred fifty-seven thousand, three hundred seventy-five".