25971493967 has 4 divisors (see below), whose sum is σ = 26411688840. Its totient is φ = 25531299096.

The previous prime is 25971493957. The next prime is 25971493987. The reversal of 25971493967 is 76939417952.

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 25971493967 - 2⁶ = 25971493903 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 (25971493957) 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, 220097348 + ... + 220097465.

It is an arithmetic number, because the mean of its divisors is an integer number (6602922210).

Almost surely, 2^25971493967 is an apocalyptic number.

25971493967 is a deficient number, since it is larger than the sum of its proper divisors (440194873).

25971493967 is an equidigital number, since it uses as much as digits as its factorization.

25971493967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440194872.

The product of its digits is 25719120, while the sum is 62.

The spelling of 25971493967 in words is "twenty-five billion, nine hundred seventy-one million, four hundred ninety-three thousand, nine hundred sixty-seven".