25949723951 has 2 divisors, whose sum is σ = 25949723952. Its totient is φ = 25949723950.

The previous prime is 25949723909. The next prime is 25949723999. The reversal of 25949723951 is 15932794952.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25949723951 - 2⁶ = 25949723887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25949723351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12974861975 + 12974861976.

It is an arithmetic number, because the mean of its divisors is an integer number (12974861976).

Almost surely, 2^25949723951 is an apocalyptic number.

25949723951 is a deficient number, since it is larger than the sum of its proper divisors (1).

25949723951 is an equidigital number, since it uses as much as digits as its factorization.

25949723951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 56.

The spelling of 25949723951 in words is "twenty-five billion, nine hundred forty-nine million, seven hundred twenty-three thousand, nine hundred fifty-one".