25341786577 has 2 divisors, whose sum is σ = 25341786578. Its totient is φ = 25341786576.

The previous prime is 25341786563. The next prime is 25341786583. The reversal of 25341786577 is 77568714352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16017180481 + 9324606096 = 126559^2 + 96564^2 .

It is a cyclic number.

It is not a de Polignac number, because 25341786577 - 2²⁷ = 25207568849 is a prime.

It is a super-2 number, since 2×25341786577² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25341786517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12670893288 + 12670893289.

It is an arithmetic number, because the mean of its divisors is an integer number (12670893289).

Almost surely, 2^25341786577 is an apocalyptic number.

It is an amenable number.

25341786577 is a deficient number, since it is larger than the sum of its proper divisors (1).

25341786577 is an equidigital number, since it uses as much as digits as its factorization.

25341786577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9878400, while the sum is 55.

The spelling of 25341786577 in words is "twenty-five billion, three hundred forty-one million, seven hundred eighty-six thousand, five hundred seventy-seven".