25493315633 has 2 divisors, whose sum is σ = 25493315634. Its totient is φ = 25493315632.

The previous prime is 25493315609. The next prime is 25493315707. The reversal of 25493315633 is 33651339452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25474713664 + 18601969 = 159608^2 + 4313^2 .

It is a cyclic number.

It is not a de Polignac number, because 25493315633 - 2³⁰ = 24419573809 is a prime.

It is not a weakly prime, because it can be changed into another prime (25493315033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12746657816 + 12746657817.

It is an arithmetic number, because the mean of its divisors is an integer number (12746657817).

Almost surely, 2^25493315633 is an apocalyptic number.

It is an amenable number.

25493315633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25493315633 is an equidigital number, since it uses as much as digits as its factorization.

25493315633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 44.

The spelling of 25493315633 in words is "twenty-five billion, four hundred ninety-three million, three hundred fifteen thousand, six hundred thirty-three".