673564446623 has 8 divisors (see below), whose sum is σ = 678727209600. Its totient is φ = 668402002840.

The previous prime is 673564446619. The next prime is 673564446647. The reversal of 673564446623 is 326644465376.

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 673564446623 - 2² = 673564446619 is a prime.

It is a super-2 number, since 2×673564446623² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673564446613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5820278 + ... + 5934876.

It is an arithmetic number, because the mean of its divisors is an integer number (84840901200).

Almost surely, 2^673564446623 is an apocalyptic number.

673564446623 is a deficient number, since it is larger than the sum of its proper divisors (5162762977).

673564446623 is a wasteful number, since it uses less digits than its factorization.

673564446623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159597.

The product of its digits is 52254720, while the sum is 56.

The spelling of 673564446623 in words is "six hundred seventy-three billion, five hundred sixty-four million, four hundred forty-six thousand, six hundred twenty-three".