25354977499757 has 2 divisors, whose sum is σ = 25354977499758. Its totient is φ = 25354977499756.

The previous prime is 25354977499741. The next prime is 25354977499759. The reversal of 25354977499757 is 75799477945352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17587463575081 + 7767513924676 = 4193741^2 + 2787026^2 .

It is a cyclic number.

It is not a de Polignac number, because 25354977499757 - 2⁴ = 25354977499741 is a prime.

Together with 25354977499759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25354977499759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12677488749878 + 12677488749879.

It is an arithmetic number, because the mean of its divisors is an integer number (12677488749879).

Almost surely, 2^{25354977499757} is an apocalyptic number.

It is an amenable number.

25354977499757 is a deficient number, since it is larger than the sum of its proper divisors (1).

25354977499757 is an equidigital number, since it uses as much as digits as its factorization.

25354977499757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21003948000, while the sum is 83.

The spelling of 25354977499757 in words is "twenty-five trillion, three hundred fifty-four billion, nine hundred seventy-seven million, four hundred ninety-nine thousand, seven hundred fifty-seven".