39845784993320 has 32 divisors (see below), whose sum is σ = 89893372880520. Its totient is φ = 15895583927040.

The previous prime is 39845784993319. The next prime is 39845784993323. The reversal of 39845784993320 is 2339948754893.

It can be written as a sum of positive squares in 4 ways, for example, as 22633558860676 + 17212226132644 = 4757474^2 + 4148762^2 .

It is not an unprimeable number, because it can be changed into a prime (39845784993323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1335299591 + ... + 1335329430.

Almost surely, 2^{39845784993320} is an apocalyptic number.

It is an amenable number.

39845784993320 is an abundant number, since it is smaller than the sum of its proper divisors (50047587887200).

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

39845784993320 is a wasteful number, since it uses less digits than its factorization.

39845784993320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670629405 (or 2670629401 counting only the distinct ones).

The product of its (nonzero) digits is 1410877440, while the sum is 74.

The spelling of 39845784993320 in words is "thirty-nine trillion, eight hundred forty-five billion, seven hundred eighty-four million, nine hundred ninety-three thousand, three hundred twenty".