25840210243 has 2 divisors, whose sum is σ = 25840210244. Its totient is φ = 25840210242.

The previous prime is 25840210237. The next prime is 25840210283. The reversal of 25840210243 is 34201204852.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25840210243 is a prime.

It is not a weakly prime, because it can be changed into another prime (25840210283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12920105121 + 12920105122.

It is an arithmetic number, because the mean of its divisors is an integer number (12920105122).

Almost surely, 2^25840210243 is an apocalyptic number.

25840210243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25840210243 is an equidigital number, since it uses as much as digits as its factorization.

25840210243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 25840210243 in words is "twenty-five billion, eight hundred forty million, two hundred ten thousand, two hundred forty-three".