673944659091 has 36 divisors (see below), whose sum is σ = 1070115695376. Its totient is φ = 408414267360.

The previous prime is 673944658967. The next prime is 673944659099. The reversal of 673944659091 is 190956449376.

673944659091 is a `hidden beast` number, since 6 + 7 + 39 + 4 + 4 + 6 + 590 + 9 + 1 = 666.

It is not a de Polignac number, because 673944659091 - 2⁷ = 673944658963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (673944659099) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16398330 + ... + 16439376.

Almost surely, 2^673944659091 is an apocalyptic number.

673944659091 is a deficient number, since it is larger than the sum of its proper divisors (396171036285).

673944659091 is a wasteful number, since it uses less digits than its factorization.

673944659091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56152 (or 56138 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 63.

The spelling of 673944659091 in words is "six hundred seventy-three billion, nine hundred forty-four million, six hundred fifty-nine thousand, ninety-one".