25581651133 has 2 divisors, whose sum is σ = 25581651134. Its totient is φ = 25581651132.

The previous prime is 25581651131. The next prime is 25581651217. The reversal of 25581651133 is 33115618552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16001744004 + 9579907129 = 126498^2 + 97877^2 .

It is a cyclic number.

It is not a de Polignac number, because 25581651133 - 2¹ = 25581651131 is a prime.

Together with 25581651131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25581651131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12790825566 + 12790825567.

It is an arithmetic number, because the mean of its divisors is an integer number (12790825567).

Almost surely, 2^25581651133 is an apocalyptic number.

It is an amenable number.

25581651133 is a deficient number, since it is larger than the sum of its proper divisors (1).

25581651133 is an equidigital number, since it uses as much as digits as its factorization.

25581651133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The spelling of 25581651133 in words is "twenty-five billion, five hundred eighty-one million, six hundred fifty-one thousand, one hundred thirty-three".