397812385444768 has 192 divisors, whose sum is σ = 912270443954688. Its totient is φ = 167231939973120.

The previous prime is 397812385444723. The next prime is 397812385444787. The reversal of 397812385444768 is 867444583218793.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32151645430 + ... + 32151657802.

It is an arithmetic number, because the mean of its divisors is an integer number (4751408562264).

Almost surely, 2^{397812385444768} 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 397812385444768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456135221977344).

397812385444768 is an abundant number, since it is smaller than the sum of its proper divisors (514458058509920).

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

397812385444768 is a wasteful number, since it uses less digits than its factorization.

397812385444768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18775 (or 18767 counting only the distinct ones).

The product of its digits is 7803371520, while the sum is 79.

The spelling of 397812385444768 in words is "three hundred ninety-seven trillion, eight hundred twelve billion, three hundred eighty-five million, four hundred forty-four thousand, seven hundred sixty-eight".