671813004601 has 2 divisors, whose sum is σ = 671813004602. Its totient is φ = 671813004600.

The previous prime is 671813004589. The next prime is 671813004637. The reversal of 671813004601 is 106400318176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636606111376 + 35206893225 = 797876^2 + 187635^2 .

It is a cyclic number.

It is not a de Polignac number, because 671813004601 - 2⁹ = 671813004089 is a prime.

It is not a weakly prime, because it can be changed into another prime (671813004101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335906502300 + 335906502301.

It is an arithmetic number, because the mean of its divisors is an integer number (335906502301).

Almost surely, 2^671813004601 is an apocalyptic number.

It is an amenable number.

671813004601 is a deficient number, since it is larger than the sum of its proper divisors (1).

671813004601 is an equidigital number, since it uses as much as digits as its factorization.

671813004601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 671813004601 in words is "six hundred seventy-one billion, eight hundred thirteen million, four thousand, six hundred one".