673506494849 has 2 divisors, whose sum is σ = 673506494850. Its totient is φ = 673506494848.

The previous prime is 673506494833. The next prime is 673506494893. The reversal of 673506494849 is 948494605376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383774055025 + 289732439824 = 619495^2 + 538268^2 .

It is a cyclic number.

It is not a de Polignac number, because 673506494849 - 2⁴ = 673506494833 is a prime.

It is a super-2 number, since 2×673506494849² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (673506494809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336753247424 + 336753247425.

It is an arithmetic number, because the mean of its divisors is an integer number (336753247425).

Almost surely, 2^673506494849 is an apocalyptic number.

It is an amenable number.

673506494849 is a deficient number, since it is larger than the sum of its proper divisors (1).

673506494849 is an equidigital number, since it uses as much as digits as its factorization.

673506494849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156764160, while the sum is 65.

The spelling of 673506494849 in words is "six hundred seventy-three billion, five hundred six million, four hundred ninety-four thousand, eight hundred forty-nine".