25642612433 has 2 divisors, whose sum is σ = 25642612434. Its totient is φ = 25642612432.

The previous prime is 25642612427. The next prime is 25642612441. The reversal of 25642612433 is 33421624652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23406552064 + 2236060369 = 152992^2 + 47287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25642612433 is a prime.

It is not a weakly prime, because it can be changed into another prime (25642612403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12821306216 + 12821306217.

It is an arithmetic number, because the mean of its divisors is an integer number (12821306217).

Almost surely, 2^25642612433 is an apocalyptic number.

It is an amenable number.

25642612433 is a deficient number, since it is larger than the sum of its proper divisors (1).

25642612433 is an equidigital number, since it uses as much as digits as its factorization.

25642612433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 38.

The spelling of 25642612433 in words is "twenty-five billion, six hundred forty-two million, six hundred twelve thousand, four hundred thirty-three".