25296717679 has 4 divisors (see below), whose sum is σ = 25316313640. Its totient is φ = 25277121720.

The previous prime is 25296717671. The next prime is 25296717683. The reversal of 25296717679 is 97671769252.

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 25296717679 - 2³ = 25296717671 is a prime.

It is a super-2 number, since 2×25296717679² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25296717671) 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, 9796044 + ... + 9798625.

It is an arithmetic number, because the mean of its divisors is an integer number (6329078410).

Almost surely, 2^25296717679 is an apocalyptic number.

25296717679 is a deficient number, since it is larger than the sum of its proper divisors (19595961).

25296717679 is a wasteful number, since it uses less digits than its factorization.

25296717679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19595960.

The product of its digits is 20003760, while the sum is 61.

The spelling of 25296717679 in words is "twenty-five billion, two hundred ninety-six million, seven hundred seventeen thousand, six hundred seventy-nine".