331385836656 has 160 divisors (see below), whose sum is σ = 1035564275200. Its totient is φ = 89202539520.

The previous prime is 331385836643. The next prime is 331385836667. The reversal of 331385836656 is 656638583133.

It is a super-2 number, since 2×331385836656² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 331385836596 and 331385836605.

It is a congruent number.

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, 1012110 + ... + 1298898.

It is an arithmetic number, because the mean of its divisors is an integer number (6472276720).

Almost surely, 2^331385836656 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 331385836656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517782137600).

331385836656 is an abundant number, since it is smaller than the sum of its proper divisors (704178438544).

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

331385836656 is a wasteful number, since it uses less digits than its factorization.

331385836656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287007 (or 287001 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 57.

The spelling of 331385836656 in words is "three hundred thirty-one billion, three hundred eighty-five million, eight hundred thirty-six thousand, six hundred fifty-six".