673545116555431 has 2 divisors, whose sum is σ = 673545116555432. Its totient is φ = 673545116555430.

The previous prime is 673545116555429. The next prime is 673545116555611. The reversal of 673545116555431 is 134555611545376.

673545116555431 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 is a cyclic number.

It is not a de Polignac number, because 673545116555431 - 2¹ = 673545116555429 is a prime.

It is a super-2 number, since 2×673545116555431² (a number of 30 digits) contains 22 as substring.

Together with 673545116555429, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 673545116555431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673545116555401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336772558277715 + 336772558277716.

It is an arithmetic number, because the mean of its divisors is an integer number (336772558277716).

Almost surely, 2^{673545116555431} is an apocalyptic number.

673545116555431 is a deficient number, since it is larger than the sum of its proper divisors (1).

673545116555431 is an equidigital number, since it uses as much as digits as its factorization.

673545116555431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400000, while the sum is 61.

The spelling of 673545116555431 in words is "six hundred seventy-three trillion, five hundred forty-five billion, one hundred sixteen million, five hundred fifty-five thousand, four hundred thirty-one".