25245054217 has 2 divisors, whose sum is σ = 25245054218. Its totient is φ = 25245054216.

The previous prime is 25245054193. The next prime is 25245054347. The reversal of 25245054217 is 71245054252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25121933001 + 123121216 = 158499^2 + 11096^2 .

It is a cyclic number.

It is not a de Polignac number, because 25245054217 - 2²³ = 25236665609 is a prime.

It is not a weakly prime, because it can be changed into another prime (25245051217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12622527108 + 12622527109.

It is an arithmetic number, because the mean of its divisors is an integer number (12622527109).

Almost surely, 2^25245054217 is an apocalyptic number.

It is an amenable number.

25245054217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25245054217 is an equidigital number, since it uses as much as digits as its factorization.

25245054217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112000, while the sum is 37.

The spelling of 25245054217 in words is "twenty-five billion, two hundred forty-five million, fifty-four thousand, two hundred seventeen".