25938315787 has 2 divisors, whose sum is σ = 25938315788. Its totient is φ = 25938315786.

The previous prime is 25938315719. The next prime is 25938315791. The reversal of 25938315787 is 78751383952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25938315787 - 2⁷ = 25938315659 is a prime.

It is a super-2 number, since 2×25938315787² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25938315587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12969157893 + 12969157894.

It is an arithmetic number, because the mean of its divisors is an integer number (12969157894).

Almost surely, 2^25938315787 is an apocalyptic number.

25938315787 is a deficient number, since it is larger than the sum of its proper divisors (1).

25938315787 is an equidigital number, since it uses as much as digits as its factorization.

25938315787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 58.

The spelling of 25938315787 in words is "twenty-five billion, nine hundred thirty-eight million, three hundred fifteen thousand, seven hundred eighty-seven".