25398626159 has 4 divisors (see below), whose sum is σ = 25756353360. Its totient is φ = 25040898960.

The previous prime is 25398626129. The next prime is 25398626189. The reversal of 25398626159 is 95162689352.

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

It is an interprime number because it is at equal distance from previous prime (25398626129) and next prime (25398626189).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25398626159 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 (25398626129) 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, 178863494 + ... + 178863635.

It is an arithmetic number, because the mean of its divisors is an integer number (6439088340).

Almost surely, 2^25398626159 is an apocalyptic number.

25398626159 is a deficient number, since it is larger than the sum of its proper divisors (357727201).

25398626159 is an equidigital number, since it uses as much as digits as its factorization.

25398626159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357727200.

The product of its digits is 6998400, while the sum is 56.

The spelling of 25398626159 in words is "twenty-five billion, three hundred ninety-eight million, six hundred twenty-six thousand, one hundred fifty-nine".