25688256863 has 4 divisors (see below), whose sum is σ = 25688625480. Its totient is φ = 25687888248.

The previous prime is 25688256791. The next prime is 25688256883. The reversal of 25688256863 is 36865288652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25688256863 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 (25688256883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44348 + ... + 230961.

It is an arithmetic number, because the mean of its divisors is an integer number (6422156370).

Almost surely, 2^25688256863 is an apocalyptic number.

25688256863 is a deficient number, since it is larger than the sum of its proper divisors (368617).

25688256863 is an equidigital number, since it uses as much as digits as its factorization.

25688256863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368616.

The product of its digits is 33177600, while the sum is 59.

The spelling of 25688256863 in words is "twenty-five billion, six hundred eighty-eight million, two hundred fifty-six thousand, eight hundred sixty-three".