25813482491 has 2 divisors, whose sum is σ = 25813482492. Its totient is φ = 25813482490.

The previous prime is 25813482437. The next prime is 25813482547. The reversal of 25813482491 is 19428431852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25813482491 - 2¹⁰ = 25813481467 is a prime.

It is not a weakly prime, because it can be changed into another prime (25813482991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12906741245 + 12906741246.

It is an arithmetic number, because the mean of its divisors is an integer number (12906741246).

Almost surely, 2^25813482491 is an apocalyptic number.

25813482491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25813482491 is an equidigital number, since it uses as much as digits as its factorization.

25813482491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 47.

The spelling of 25813482491 in words is "twenty-five billion, eight hundred thirteen million, four hundred eighty-two thousand, four hundred ninety-one".