331657316540 has 96 divisors (see below), whose sum is σ = 765988634880. Its totient is φ = 119621491200.

The previous prime is 331657316461. The next prime is 331657316561. The reversal of 331657316540 is 45613756133.

It is a super-2 number, since 2×331657316540² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 331657316491 and 331657316500.

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, 36477395 + ... + 36486485.

It is an arithmetic number, because the mean of its divisors is an integer number (7979048280).

Almost surely, 2^331657316540 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 331657316540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382994317440).

331657316540 is an abundant number, since it is smaller than the sum of its proper divisors (434331318340).

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

331657316540 is a wasteful number, since it uses less digits than its factorization.

331657316540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10443 (or 10441 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 331657316540 in words is "three hundred thirty-one billion, six hundred fifty-seven million, three hundred sixteen thousand, five hundred forty".