320858805136 has 135 divisors (see below), whose sum is σ = 669096450043. Its totient is φ = 149042745280.

The previous prime is 320858805121. The next prime is 320858805187. The reversal of 320858805136 is 631508858023.

It is a happy number.

The square root of 320858805136 is 566444.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320858805136.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2449303791 + ... + 2449303921.

Almost surely, 2^320858805136 is an apocalyptic number.

320858805136 is the 566444-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320858805136

320858805136 is an abundant number, since it is smaller than the sum of its proper divisors (348237644907).

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

320858805136 is an equidigital number, since it uses as much as digits as its factorization.

320858805136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

Multiplying 320858805136 by its sum of digits (49), we get a square (15722081451664 = 3965108²).

The spelling of 320858805136 in words is "three hundred twenty billion, eight hundred fifty-eight million, eight hundred five thousand, one hundred thirty-six".