673835386649 has 2 divisors, whose sum is σ = 673835386650. Its totient is φ = 673835386648.

The previous prime is 673835386643. The next prime is 673835386661. The reversal of 673835386649 is 946683538376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652166074624 + 21669312025 = 807568^2 + 147205^2 .

It is a cyclic number.

It is not a de Polignac number, because 673835386649 - 2²⁴ = 673818609433 is a prime.

It is not a weakly prime, because it can be changed into another prime (673835386643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336917693324 + 336917693325.

It is an arithmetic number, because the mean of its divisors is an integer number (336917693325).

Almost surely, 2^673835386649 is an apocalyptic number.

It is an amenable number.

673835386649 is a deficient number, since it is larger than the sum of its proper divisors (1).

673835386649 is an equidigital number, since it uses as much as digits as its factorization.

673835386649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470292480, while the sum is 68.

The spelling of 673835386649 in words is "six hundred seventy-three billion, eight hundred thirty-five million, three hundred eighty-six thousand, six hundred forty-nine".