672320803812 has 48 divisors (see below), whose sum is σ = 1794581268480. Its totient is φ = 191906752032.

The previous prime is 672320803801. The next prime is 672320803813. The reversal of 672320803812 is 218308023276.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (672320803813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3764418 + ... + 3938969.

It is an arithmetic number, because the mean of its divisors is an integer number (37387109760).

Almost surely, 2^672320803812 is an apocalyptic number.

It is an amenable number.

672320803812 is an abundant number, since it is smaller than the sum of its proper divisors (1122260464668).

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

672320803812 is a wasteful number, since it uses less digits than its factorization.

672320803812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7704440 (or 7704438 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 672320803812 in words is "six hundred seventy-two billion, three hundred twenty million, eight hundred three thousand, eight hundred twelve".