25772799643 has 2 divisors, whose sum is σ = 25772799644. Its totient is φ = 25772799642.

The previous prime is 25772799631. The next prime is 25772799653. The reversal of 25772799643 is 34699727752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25772799643 is a prime.

It is not a weakly prime, because it can be changed into another prime (25772799653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12886399821 + 12886399822.

It is an arithmetic number, because the mean of its divisors is an integer number (12886399822).

Almost surely, 2^25772799643 is an apocalyptic number.

25772799643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25772799643 is an equidigital number, since it uses as much as digits as its factorization.

25772799643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 61.

The spelling of 25772799643 in words is "twenty-five billion, seven hundred seventy-two million, seven hundred ninety-nine thousand, six hundred forty-three".