25819152797 has 2 divisors, whose sum is σ = 25819152798. Its totient is φ = 25819152796.

The previous prime is 25819152791. The next prime is 25819152809. The reversal of 25819152797 is 79725191852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24200780356 + 1618372441 = 155566^2 + 40229^2 .

It is a cyclic number.

It is not a de Polignac number, because 25819152797 - 2¹⁰ = 25819151773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25819152791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12909576398 + 12909576399.

It is an arithmetic number, because the mean of its divisors is an integer number (12909576399).

Almost surely, 2^25819152797 is an apocalyptic number.

It is an amenable number.

25819152797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25819152797 is an equidigital number, since it uses as much as digits as its factorization.

25819152797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 56.

The spelling of 25819152797 in words is "twenty-five billion, eight hundred nineteen million, one hundred fifty-two thousand, seven hundred ninety-seven".