25891425249 has 8 divisors (see below), whose sum is σ = 34529691552. Its totient is φ = 17257054560.

The previous prime is 25891425247. The next prime is 25891425251. The reversal of 25891425249 is 94252419852.

It is an interprime number because it is at equal distance from previous prime (25891425247) and next prime (25891425251).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25891425249 - 2¹ = 25891425247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25891425247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958359 + ... + 985004.

It is an arithmetic number, because the mean of its divisors is an integer number (4316211444).

Almost surely, 2^25891425249 is an apocalyptic number.

It is an amenable number.

25891425249 is a deficient number, since it is larger than the sum of its proper divisors (8638266303).

25891425249 is a wasteful number, since it uses less digits than its factorization.

25891425249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947807.

The product of its digits is 2073600, while the sum is 51.

The spelling of 25891425249 in words is "twenty-five billion, eight hundred ninety-one million, four hundred twenty-five thousand, two hundred forty-nine".