25351053617 has 2 divisors, whose sum is σ = 25351053618. Its totient is φ = 25351053616.

The previous prime is 25351053589. The next prime is 25351053643. The reversal of 25351053617 is 71635015352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14953376656 + 10397676961 = 122284^2 + 101969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25351053617 is a prime.

It is not a weakly prime, because it can be changed into another prime (25351053647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12675526808 + 12675526809.

It is an arithmetic number, because the mean of its divisors is an integer number (12675526809).

Almost surely, 2^25351053617 is an apocalyptic number.

It is an amenable number.

25351053617 is a deficient number, since it is larger than the sum of its proper divisors (1).

25351053617 is an equidigital number, since it uses as much as digits as its factorization.

25351053617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 38.

Adding to 25351053617 its reverse (71635015352), we get a palindrome (96986068969).

The spelling of 25351053617 in words is "twenty-five billion, three hundred fifty-one million, fifty-three thousand, six hundred seventeen".