25425252533 has 2 divisors, whose sum is σ = 25425252534. Its totient is φ = 25425252532.

The previous prime is 25425252451. The next prime is 25425252539. The reversal of 25425252533 is 33525252452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25415374084 + 9878449 = 159422^2 + 3143^2 .

It is a cyclic number.

It is not a de Polignac number, because 25425252533 - 2²⁴ = 25408475317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25425252539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12712626266 + 12712626267.

It is an arithmetic number, because the mean of its divisors is an integer number (12712626267).

Almost surely, 2^25425252533 is an apocalyptic number.

It is an amenable number.

25425252533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25425252533 is an equidigital number, since it uses as much as digits as its factorization.

25425252533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360000, while the sum is 38.

The spelling of 25425252533 in words is "twenty-five billion, four hundred twenty-five million, two hundred fifty-two thousand, five hundred thirty-three".