7965720445 has 4 divisors (see below), whose sum is σ = 9558864540. Its totient is φ = 6372576352.

The previous prime is 7965720443. The next prime is 7965720457. The reversal of 7965720445 is 5440275697.

It is a happy number.

7965720445 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1745401284 + 6220319161 = 41778^2 + 78869^2 .

It is a cyclic number.

It is not a de Polignac number, because 7965720445 - 2¹ = 7965720443 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7965720443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796572040 + ... + 796572049.

It is an arithmetic number, because the mean of its divisors is an integer number (2389716135).

Almost surely, 2^7965720445 is an apocalyptic number.

It is an amenable number.

7965720445 is a deficient number, since it is larger than the sum of its proper divisors (1593144095).

7965720445 is a wasteful number, since it uses less digits than its factorization.

7965720445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593144094.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The square root of 7965720445 is about 89250.8848415521. The cubic root of 7965720445 is about 1997.1392805096.

The spelling of 7965720445 in words is "seven billion, nine hundred sixty-five million, seven hundred twenty thousand, four hundred forty-five".