398195581056 has 256 divisors, whose sum is σ = 1311311151360. Its totient is φ = 104250802176.

The previous prime is 398195580967. The next prime is 398195581067. The reversal of 398195581056 is 650185591893.

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, 4745740 + ... + 4828916.

It is an arithmetic number, because the mean of its divisors is an integer number (5122309185).

Almost surely, 2^398195581056 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 398195581056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655655575680).

398195581056 is an abundant number, since it is smaller than the sum of its proper divisors (913115570304).

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

398195581056 is a wasteful number, since it uses less digits than its factorization.

398195581056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83351 (or 83339 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 60.

The spelling of 398195581056 in words is "three hundred ninety-eight billion, one hundred ninety-five million, five hundred eighty-one thousand, fifty-six".