25446226849 has 2 divisors, whose sum is σ = 25446226850. Its totient is φ = 25446226848.

The previous prime is 25446226789. The next prime is 25446226867. The reversal of 25446226849 is 94862264452.

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., 19580964624 + 5865262225 = 139932^2 + 76585^2 .

It is a cyclic number.

It is not a de Polignac number, because 25446226849 - 2³¹ = 23298743201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25446226796 and 25446226805.

It is not a weakly prime, because it can be changed into another prime (25446226889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12723113424 + 12723113425.

It is an arithmetic number, because the mean of its divisors is an integer number (12723113425).

Almost surely, 2^25446226849 is an apocalyptic number.

It is an amenable number.

25446226849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25446226849 is an equidigital number, since it uses as much as digits as its factorization.

25446226849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 52.

The spelling of 25446226849 in words is "twenty-five billion, four hundred forty-six million, two hundred twenty-six thousand, eight hundred forty-nine".