25447679279 has 24 divisors (see below), whose sum is σ = 29527947120. Its totient is φ = 21853877760.

The previous prime is 25447679269. The next prime is 25447679333. The reversal of 25447679279 is 97297674452.

It is not a de Polignac number, because 25447679279 - 2⁴ = 25447679263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25447679239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 795869 + ... + 827225.

It is an arithmetic number, because the mean of its divisors is an integer number (1230331130).

Almost surely, 2^25447679279 is an apocalyptic number.

25447679279 is a deficient number, since it is larger than the sum of its proper divisors (4080267841).

25447679279 is a wasteful number, since it uses less digits than its factorization.

25447679279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31751 (or 31740 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 62.

The spelling of 25447679279 in words is "twenty-five billion, four hundred forty-seven million, six hundred seventy-nine thousand, two hundred seventy-nine".