673761561949 has 8 divisors (see below), whose sum is σ = 775112640128. Its totient is φ = 573685340400.

The previous prime is 673761561943. The next prime is 673761561973. The reversal of 673761561949 is 949165167376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 673761561949 - 2⁵ = 673761561917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673761561943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318713022 + ... + 318715135.

It is an arithmetic number, because the mean of its divisors is an integer number (96889080016).

Almost surely, 2^673761561949 is an apocalyptic number.

It is an amenable number.

673761561949 is a deficient number, since it is larger than the sum of its proper divisors (101351078179).

673761561949 is a wasteful number, since it uses less digits than its factorization.

673761561949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637428315.

The product of its digits is 51438240, while the sum is 64.

The spelling of 673761561949 in words is "six hundred seventy-three billion, seven hundred sixty-one million, five hundred sixty-one thousand, nine hundred forty-nine".