25896657679 has 16 divisors (see below), whose sum is σ = 27275409568. Its totient is φ = 24556234752.

The previous prime is 25896657667. The next prime is 25896657701. The reversal of 25896657679 is 97675669852.

It is a cyclic number.

It is not a de Polignac number, because 25896657679 - 2¹³ = 25896649487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25896657629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709279 + ... + 744895.

It is an arithmetic number, because the mean of its divisors is an integer number (1704713098).

Almost surely, 2^25896657679 is an apocalyptic number.

25896657679 is a deficient number, since it is larger than the sum of its proper divisors (1378751889).

25896657679 is a wasteful number, since it uses less digits than its factorization.

25896657679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36154.

The product of its digits is 342921600, while the sum is 70.

The spelling of 25896657679 in words is "twenty-five billion, eight hundred ninety-six million, six hundred fifty-seven thousand, six hundred seventy-nine".