25486531289 has 2 divisors, whose sum is σ = 25486531290. Its totient is φ = 25486531288.

The previous prime is 25486531261. The next prime is 25486531307. The reversal of 25486531289 is 98213568452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23934565264 + 1551966025 = 154708^2 + 39395^2 .

It is a cyclic number.

It is not a de Polignac number, because 25486531289 - 2⁸ = 25486531033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25486531289.

It is not a weakly prime, because it can be changed into another prime (25486531249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12743265644 + 12743265645.

It is an arithmetic number, because the mean of its divisors is an integer number (12743265645).

Almost surely, 2^25486531289 is an apocalyptic number.

It is an amenable number.

25486531289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25486531289 is an equidigital number, since it uses as much as digits as its factorization.

25486531289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4147200, while the sum is 53.

The spelling of 25486531289 in words is "twenty-five billion, four hundred eighty-six million, five hundred thirty-one thousand, two hundred eighty-nine".