25877370997 has 2 divisors, whose sum is σ = 25877370998. Its totient is φ = 25877370996.

The previous prime is 25877370991. The next prime is 25877371057. The reversal of 25877370997 is 79907377852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16234327396 + 9643043601 = 127414^2 + 98199^2 .

It is a cyclic number.

It is not a de Polignac number, because 25877370997 - 2³ = 25877370989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25877370991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12938685498 + 12938685499.

It is an arithmetic number, because the mean of its divisors is an integer number (12938685499).

Almost surely, 2^25877370997 is an apocalyptic number.

It is an amenable number.

25877370997 is a deficient number, since it is larger than the sum of its proper divisors (1).

25877370997 is an equidigital number, since it uses as much as digits as its factorization.

25877370997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46675440, while the sum is 64.

The spelling of 25877370997 in words is "twenty-five billion, eight hundred seventy-seven million, three hundred seventy thousand, nine hundred ninety-seven".