673518816 has 36 divisors (see below), whose sum is σ = 1915319952. Its totient is φ = 224506176.

The previous prime is 673518793. The next prime is 673518817. The reversal of 673518816 is 618815376.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673518817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1169016 + ... + 1169591.

It is an arithmetic number, because the mean of its divisors is an integer number (53203332).

Almost surely, 2^673518816 is an apocalyptic number.

It is an amenable number.

673518816 is an abundant number, since it is smaller than the sum of its proper divisors (1241801136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673518816 is a wasteful number, since it uses less digits than its factorization.

673518816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338623 (or 2338612 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 673518816 is about 25952.2410592997. The cubic root of 673518816 is about 876.5632207130.

It can be divided in two parts, 67351 and 8816, that added together give a palindrome (76167).

The spelling of 673518816 in words is "six hundred seventy-three million, five hundred eighteen thousand, eight hundred sixteen".