25697422771 has 2 divisors, whose sum is σ = 25697422772. Its totient is φ = 25697422770.

The previous prime is 25697422763. The next prime is 25697422811. The reversal of 25697422771 is 17722479652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25697422771 - 2³ = 25697422763 is a prime.

It is a super-3 number, since 3×25697422771³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25697422721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12848711385 + 12848711386.

It is an arithmetic number, because the mean of its divisors is an integer number (12848711386).

Almost surely, 2^25697422771 is an apocalyptic number.

25697422771 is a deficient number, since it is larger than the sum of its proper divisors (1).

25697422771 is an equidigital number, since it uses as much as digits as its factorization.

25697422771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 52.

The spelling of 25697422771 in words is "twenty-five billion, six hundred ninety-seven million, four hundred twenty-two thousand, seven hundred seventy-one".