681257422319 has 2 divisors, whose sum is σ = 681257422320. Its totient is φ = 681257422318.

The previous prime is 681257422301. The next prime is 681257422399. The reversal of 681257422319 is 913224752186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681257422319 - 2²⁴ = 681240645103 is a prime.

It is a super-2 number, since 2×681257422319² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681257422399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340628711159 + 340628711160.

It is an arithmetic number, because the mean of its divisors is an integer number (340628711160).

Almost surely, 2^681257422319 is an apocalyptic number.

681257422319 is a deficient number, since it is larger than the sum of its proper divisors (1).

681257422319 is an equidigital number, since it uses as much as digits as its factorization.

681257422319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The spelling of 681257422319 in words is "six hundred eighty-one billion, two hundred fifty-seven million, four hundred twenty-two thousand, three hundred nineteen".