25761491599 has 2 divisors, whose sum is σ = 25761491600. Its totient is φ = 25761491598.

The previous prime is 25761491551. The next prime is 25761491617. The reversal of 25761491599 is 99519416752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25761491599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25761491099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880745799 + 12880745800.

It is an arithmetic number, because the mean of its divisors is an integer number (12880745800).

Almost surely, 2^25761491599 is an apocalyptic number.

25761491599 is a deficient number, since it is larger than the sum of its proper divisors (1).

25761491599 is an equidigital number, since it uses as much as digits as its factorization.

25761491599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 58.

The spelling of 25761491599 in words is "twenty-five billion, seven hundred sixty-one million, four hundred ninety-one thousand, five hundred ninety-nine".