25342326643 has 2 divisors, whose sum is σ = 25342326644. Its totient is φ = 25342326642.

The previous prime is 25342326641. The next prime is 25342326677. The reversal of 25342326643 is 34662324352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25342326643 - 2¹ = 25342326641 is a prime.

Together with 25342326641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25342326596 and 25342326605.

It is not a weakly prime, because it can be changed into another prime (25342326641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12671163321 + 12671163322.

It is an arithmetic number, because the mean of its divisors is an integer number (12671163322).

Almost surely, 2^25342326643 is an apocalyptic number.

25342326643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25342326643 is an equidigital number, since it uses as much as digits as its factorization.

25342326643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 40.

The spelling of 25342326643 in words is "twenty-five billion, three hundred forty-two million, three hundred twenty-six thousand, six hundred forty-three".