25951308259 has 4 divisors (see below), whose sum is σ = 25954335504. Its totient is φ = 25948281016.

The previous prime is 25951308223. The next prime is 25951308301. The reversal of 25951308259 is 95280315952.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25951308259 - 2¹⁵ = 25951275491 is a prime.

It is a super-2 number, since 2×25951308259² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25951309259) 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, 1500727 + ... + 1517920.

It is an arithmetic number, because the mean of its divisors is an integer number (6488583876).

Almost surely, 2^25951308259 is an apocalyptic number.

25951308259 is a deficient number, since it is larger than the sum of its proper divisors (3027245).

25951308259 is an equidigital number, since it uses as much as digits as its factorization.

25951308259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027244.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 25951308259 in words is "twenty-five billion, nine hundred fifty-one million, three hundred eight thousand, two hundred fifty-nine".