320738341840 has 80 divisors (see below), whose sum is σ = 897102760320. Its totient is φ = 104179668480.

The previous prime is 320738341817. The next prime is 320738341873. The reversal of 320738341840 is 48143837023.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15061651 + ... + 15082930.

It is an arithmetic number, because the mean of its divisors is an integer number (11213784504).

Almost surely, 2^320738341840 is an apocalyptic number.

It is an amenable number.

320738341840 is an abundant number, since it is smaller than the sum of its proper divisors (576364418480).

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

320738341840 is a wasteful number, since it uses less digits than its factorization.

320738341840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30144620 (or 30144614 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 320738341840 in words is "three hundred twenty billion, seven hundred thirty-eight million, three hundred forty-one thousand, eight hundred forty".