25697709601 has 2 divisors, whose sum is σ = 25697709602. Its totient is φ = 25697709600.

The previous prime is 25697709599. The next prime is 25697709637. The reversal of 25697709601 is 10690779652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17113872400 + 8583837201 = 130820^2 + 92649^2 .

It is a cyclic number.

It is not a de Polignac number, because 25697709601 - 2¹ = 25697709599 is a prime.

Together with 25697709599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25697709671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12848854800 + 12848854801.

It is an arithmetic number, because the mean of its divisors is an integer number (12848854801).

Almost surely, 2^25697709601 is an apocalyptic number.

It is an amenable number.

25697709601 is a deficient number, since it is larger than the sum of its proper divisors (1).

25697709601 is an equidigital number, since it uses as much as digits as its factorization.

25697709601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The spelling of 25697709601 in words is "twenty-five billion, six hundred ninety-seven million, seven hundred nine thousand, six hundred one".