671736172043 has 2 divisors, whose sum is σ = 671736172044. Its totient is φ = 671736172042.

The previous prime is 671736172021. The next prime is 671736172069. The reversal of 671736172043 is 340271637176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671736172043 - 2¹⁴ = 671736155659 is a prime.

It is not a weakly prime, because it can be changed into another prime (671736172343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335868086021 + 335868086022.

It is an arithmetic number, because the mean of its divisors is an integer number (335868086022).

Almost surely, 2^671736172043 is an apocalyptic number.

671736172043 is a deficient number, since it is larger than the sum of its proper divisors (1).

671736172043 is an equidigital number, since it uses as much as digits as its factorization.

671736172043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 671736172043 in words is "six hundred seventy-one billion, seven hundred thirty-six million, one hundred seventy-two thousand, forty-three".