25981551319 has 2 divisors, whose sum is σ = 25981551320. Its totient is φ = 25981551318.

The previous prime is 25981551301. The next prime is 25981551373. The reversal of 25981551319 is 91315518952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25981551319 - 2⁹ = 25981550807 is a prime.

It is a super-2 number, since 2×25981551319² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25981551389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12990775659 + 12990775660.

It is an arithmetic number, because the mean of its divisors is an integer number (12990775660).

Almost surely, 2^25981551319 is an apocalyptic number.

25981551319 is a deficient number, since it is larger than the sum of its proper divisors (1).

25981551319 is an equidigital number, since it uses as much as digits as its factorization.

25981551319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 49.

The spelling of 25981551319 in words is "twenty-five billion, nine hundred eighty-one million, five hundred fifty-one thousand, three hundred nineteen".