673279326720 has 2560 divisors, whose sum is σ = 3310348124160. Its totient is φ = 125172449280.

The previous prime is 673279326701. The next prime is 673279326751. The reversal of 673279326720 is 27623972376.

It is a tau number, because it is divible by the number of its divisors (2560).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2559997309 + ... + 2559997571.

It is an arithmetic number, because the mean of its divisors is an integer number (1293104736).

Almost surely, 2^673279326720 is an apocalyptic number.

673279326720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673279326720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655174062080).

673279326720 is an abundant number, since it is smaller than the sum of its proper divisors (2637068797440).

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

673279326720 is a wasteful number, since it uses less digits than its factorization.

673279326720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 54.

It can be divided in two parts, 673279 and 326720, that added together give a palindrome (999999).

The spelling of 673279326720 in words is "six hundred seventy-three billion, two hundred seventy-nine million, three hundred twenty-six thousand, seven hundred twenty".