25823789261 has 2 divisors, whose sum is σ = 25823789262. Its totient is φ = 25823789260.

The previous prime is 25823789231. The next prime is 25823789273. The reversal of 25823789261 is 16298732852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16539503236 + 9284286025 = 128606^2 + 96355^2 .

It is a cyclic number.

It is not a de Polignac number, because 25823789261 - 2¹⁸ = 25823527117 is a prime.

It is a super-2 number, since 2×25823789261² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25823789231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12911894630 + 12911894631.

It is an arithmetic number, because the mean of its divisors is an integer number (12911894631).

Almost surely, 2^25823789261 is an apocalyptic number.

It is an amenable number.

25823789261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25823789261 is an equidigital number, since it uses as much as digits as its factorization.

25823789261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 25823789261 in words is "twenty-five billion, eight hundred twenty-three million, seven hundred eighty-nine thousand, two hundred sixty-one".