25449395841497 has 2 divisors, whose sum is σ = 25449395841498. Its totient is φ = 25449395841496.

The previous prime is 25449395841491. The next prime is 25449395841509. The reversal of 25449395841497 is 79414859394452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18269375484361 + 7180020357136 = 4274269^2 + 2679556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25449395841497 is a prime.

It is not a weakly prime, because it can be changed into another prime (25449395841491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12724697920748 + 12724697920749.

It is an arithmetic number, because the mean of its divisors is an integer number (12724697920749).

Almost surely, 2^{25449395841497} is an apocalyptic number.

It is an amenable number.

25449395841497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25449395841497 is an equidigital number, since it uses as much as digits as its factorization.

25449395841497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1567641600, while the sum is 74.

The spelling of 25449395841497 in words is "twenty-five trillion, four hundred forty-nine billion, three hundred ninety-five million, eight hundred forty-one thousand, four hundred ninety-seven".