681158006129 has 2 divisors, whose sum is σ = 681158006130. Its totient is φ = 681158006128.

The previous prime is 681158006093. The next prime is 681158006131. The reversal of 681158006129 is 921600851186.

It is a happy number.

681158006129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616771481104 + 64386525025 = 785348^2 + 253745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681158006129 is a prime.

Together with 681158006131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681158006149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340579003064 + 340579003065.

It is an arithmetic number, because the mean of its divisors is an integer number (340579003065).

Almost surely, 2^681158006129 is an apocalyptic number.

It is an amenable number.

681158006129 is a deficient number, since it is larger than the sum of its proper divisors (1).

681158006129 is an equidigital number, since it uses as much as digits as its factorization.

681158006129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 681158006129 in words is "six hundred eighty-one billion, one hundred fifty-eight million, six thousand, one hundred twenty-nine".