25697422867 has 2 divisors, whose sum is σ = 25697422868. Its totient is φ = 25697422866.

The previous prime is 25697422837. The next prime is 25697422889. The reversal of 25697422867 is 76822479652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25697422867 - 2²⁷ = 25563205139 is a prime.

It is not a weakly prime, because it can be changed into another prime (25697422837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12848711433 + 12848711434.

It is an arithmetic number, because the mean of its divisors is an integer number (12848711434).

Almost surely, 2^25697422867 is an apocalyptic number.

25697422867 is a deficient number, since it is larger than the sum of its proper divisors (1).

25697422867 is an equidigital number, since it uses as much as digits as its factorization.

25697422867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 58.

It can be divided in two parts, 256974 and 22867, that added together give a 4-th power (279841 = 23⁴).

The spelling of 25697422867 in words is "twenty-five billion, six hundred ninety-seven million, four hundred twenty-two thousand, eight hundred sixty-seven".