25918967603 has 2 divisors, whose sum is σ = 25918967604. Its totient is φ = 25918967602.

The previous prime is 25918967597. The next prime is 25918967729. The reversal of 25918967603 is 30676981952.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25918967603 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25918967003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12959483801 + 12959483802.

It is an arithmetic number, because the mean of its divisors is an integer number (12959483802).

Almost surely, 2^25918967603 is an apocalyptic number.

25918967603 is a deficient number, since it is larger than the sum of its proper divisors (1).

25918967603 is an equidigital number, since it uses as much as digits as its factorization.

25918967603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 25918967603 in words is "twenty-five billion, nine hundred eighteen million, nine hundred sixty-seven thousand, six hundred three".