25168676979 has 4 divisors (see below), whose sum is σ = 33558235976. Its totient is φ = 16779117984.

The previous prime is 25168676963. The next prime is 25168676989. The reversal of 25168676979 is 97967686152.

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

It is not a de Polignac number, because 25168676979 - 2⁴ = 25168676963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25168676909) 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, 4194779494 + ... + 4194779499.

It is an arithmetic number, because the mean of its divisors is an integer number (8389558994).

Almost surely, 2^25168676979 is an apocalyptic number.

25168676979 is a deficient number, since it is larger than the sum of its proper divisors (8389558997).

25168676979 is an equidigital number, since it uses as much as digits as its factorization.

25168676979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8389558996.

The product of its digits is 68584320, while the sum is 66.

The spelling of 25168676979 in words is "twenty-five billion, one hundred sixty-eight million, six hundred seventy-six thousand, nine hundred seventy-nine".