25261267279 has 4 divisors (see below), whose sum is σ = 25324263360. Its totient is φ = 25198271200.

The previous prime is 25261267271. The next prime is 25261267289. The reversal of 25261267279 is 97276216252.

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 25261267279 - 2³ = 25261267271 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 (25261267271) 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, 31497439 + ... + 31498240.

It is an arithmetic number, because the mean of its divisors is an integer number (6331065840).

Almost surely, 2^25261267279 is an apocalyptic number.

25261267279 is a deficient number, since it is larger than the sum of its proper divisors (62996081).

25261267279 is an equidigital number, since it uses as much as digits as its factorization.

25261267279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62996080.

The product of its digits is 1270080, while the sum is 49.

The spelling of 25261267279 in words is "twenty-five billion, two hundred sixty-one million, two hundred sixty-seven thousand, two hundred seventy-nine".