673355682781 has 2 divisors, whose sum is σ = 673355682782. Its totient is φ = 673355682780.

The previous prime is 673355682773. The next prime is 673355682803. The reversal of 673355682781 is 187286553376.

673355682781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622890306756 + 50465376025 = 789234^2 + 224645^2 .

It is a cyclic number.

It is not a de Polignac number, because 673355682781 - 2³ = 673355682773 is a prime.

It is a super-2 number, since 2×673355682781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673355682281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336677841390 + 336677841391.

It is an arithmetic number, because the mean of its divisors is an integer number (336677841391).

Almost surely, 2^673355682781 is an apocalyptic number.

It is an amenable number.

673355682781 is a deficient number, since it is larger than the sum of its proper divisors (1).

673355682781 is an equidigital number, since it uses as much as digits as its factorization.

673355682781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 61.

The spelling of 673355682781 in words is "six hundred seventy-three billion, three hundred fifty-five million, six hundred eighty-two thousand, seven hundred eighty-one".