681100381079 has 2 divisors, whose sum is σ = 681100381080. Its totient is φ = 681100381078.

The previous prime is 681100381067. The next prime is 681100381183. The reversal of 681100381079 is 970183001186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681100381079 - 2³² = 676805413783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681100381009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340550190539 + 340550190540.

It is an arithmetic number, because the mean of its divisors is an integer number (340550190540).

Almost surely, 2^681100381079 is an apocalyptic number.

681100381079 is a deficient number, since it is larger than the sum of its proper divisors (1).

681100381079 is an equidigital number, since it uses as much as digits as its factorization.

681100381079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 681100381079 in words is "six hundred eighty-one billion, one hundred million, three hundred eighty-one thousand, seventy-nine".