7980445720 has 64 divisors (see below), whose sum is σ = 19420521120. Its totient is φ = 2933935104.

The previous prime is 7980445717. The next prime is 7980445729. The reversal of 7980445720 is 275440897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7980445729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88227 + ... + 154093.

Almost surely, 2^7980445720 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 7980445720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9710260560).

7980445720 is an abundant number, since it is smaller than the sum of its proper divisors (11440075400).

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

7980445720 is a wasteful number, since it uses less digits than its factorization.

7980445720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66124 (or 66120 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 7980445720 is about 89333.3404726365. The cubic root of 7980445720 is about 1998.3691471877.

The spelling of 7980445720 in words is "seven billion, nine hundred eighty million, four hundred forty-five thousand, seven hundred twenty".