25407665797 has 2 divisors, whose sum is σ = 25407665798. Its totient is φ = 25407665796.

The previous prime is 25407665791. The next prime is 25407665839. The reversal of 25407665797 is 79756670452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25395928321 + 11737476 = 159361^2 + 3426^2 .

It is a cyclic number.

It is not a de Polignac number, because 25407665797 - 2⁷ = 25407665669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25407665791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12703832898 + 12703832899.

It is an arithmetic number, because the mean of its divisors is an integer number (12703832899).

Almost surely, 2^25407665797 is an apocalyptic number.

It is an amenable number.

25407665797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25407665797 is an equidigital number, since it uses as much as digits as its factorization.

25407665797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22226400, while the sum is 58.

The spelling of 25407665797 in words is "twenty-five billion, four hundred seven million, six hundred sixty-five thousand, seven hundred ninety-seven".