673440805344 has 192 divisors, whose sum is σ = 1844395660800. Its totient is φ = 214891579392.

The previous prime is 673440805327. The next prime is 673440805363. The reversal of 673440805344 is 443508044376.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 673440805293 and 673440805302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185877517 + ... + 185881139.

It is an arithmetic number, because the mean of its divisors is an integer number (9606227400).

Almost surely, 2^673440805344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673440805344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922197830400).

673440805344 is an abundant number, since it is smaller than the sum of its proper divisors (1170954855456).

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

673440805344 is a wasteful number, since it uses less digits than its factorization.

673440805344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217 (or 4209 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 48.

The spelling of 673440805344 in words is "six hundred seventy-three billion, four hundred forty million, eight hundred five thousand, three hundred forty-four".