397688692643616 has 384 divisors, whose sum is σ = 1212483015797760. Its totient is φ = 112797477273600.

The previous prime is 397688692643609. The next prime is 397688692643687. The reversal of 397688692643616 is 616346296886793.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4950708540 + ... + 4950788868.

It is an arithmetic number, because the mean of its divisors is an integer number (3157507853640).

Almost surely, 2^{397688692643616} 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 397688692643616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (606241507898880).

397688692643616 is an abundant number, since it is smaller than the sum of its proper divisors (814794323154144).

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

397688692643616 is a wasteful number, since it uses less digits than its factorization.

397688692643616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81888 (or 81880 counting only the distinct ones).

The product of its digits is 20316635136, while the sum is 84.

The spelling of 397688692643616 in words is "three hundred ninety-seven trillion, six hundred eighty-eight billion, six hundred ninety-two million, six hundred forty-three thousand, six hundred sixteen".