25843906901 has 2 divisors, whose sum is σ = 25843906902. Its totient is φ = 25843906900.

The previous prime is 25843906897. The next prime is 25843906903. The reversal of 25843906901 is 10960934852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15893644900 + 9950262001 = 126070^2 + 99751^2 .

It is a cyclic number.

It is not a de Polignac number, because 25843906901 - 2² = 25843906897 is a prime.

Together with 25843906903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25843906903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12921953450 + 12921953451.

It is an arithmetic number, because the mean of its divisors is an integer number (12921953451).

Almost surely, 2^25843906901 is an apocalyptic number.

It is an amenable number.

25843906901 is a deficient number, since it is larger than the sum of its proper divisors (1).

25843906901 is an equidigital number, since it uses as much as digits as its factorization.

25843906901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 25843906901 in words is "twenty-five billion, eight hundred forty-three million, nine hundred six thousand, nine hundred one".