671928129101 has 2 divisors, whose sum is σ = 671928129102. Its totient is φ = 671928129100.

The previous prime is 671928129079. The next prime is 671928129167. The reversal of 671928129101 is 101921829176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631589415076 + 40338714025 = 794726^2 + 200845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671928129101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671928125101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335964064550 + 335964064551.

It is an arithmetic number, because the mean of its divisors is an integer number (335964064551).

Almost surely, 2^671928129101 is an apocalyptic number.

It is an amenable number.

671928129101 is a deficient number, since it is larger than the sum of its proper divisors (1).

671928129101 is an equidigital number, since it uses as much as digits as its factorization.

671928129101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 47.

The spelling of 671928129101 in words is "six hundred seventy-one billion, nine hundred twenty-eight million, one hundred twenty-nine thousand, one hundred one".