25845881407 has 2 divisors, whose sum is σ = 25845881408. Its totient is φ = 25845881406.

The previous prime is 25845881273. The next prime is 25845881447. The reversal of 25845881407 is 70418854852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25845881407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25845881447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12922940703 + 12922940704.

It is an arithmetic number, because the mean of its divisors is an integer number (12922940704).

Almost surely, 2^25845881407 is an apocalyptic number.

25845881407 is a deficient number, since it is larger than the sum of its proper divisors (1).

25845881407 is an equidigital number, since it uses as much as digits as its factorization.

25845881407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2867200, while the sum is 52.

The spelling of 25845881407 in words is "twenty-five billion, eight hundred forty-five million, eight hundred eighty-one thousand, four hundred seven".