7969791978724 has 9 divisors (see below), whose sum is σ = 13947145843561. Its totient is φ = 3984893166280.

The previous prime is 7969791978713. The next prime is 7969791978791. The reversal of 7969791978724 is 4278791979697.

The square root of 7969791978724 is 2823082.

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

It can be written as a sum of positive squares in only one way, i.e., 5177818332324 + 2791973646400 = 2275482^2 + 1670920^2 .

It is a super-2 number, since 2×7969791978724² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4940394 + ... + 6351934.

Almost surely, 2^{7969791978724} is an apocalyptic number.

7969791978724 is the 2823082-nd square number.

It is an amenable number.

7969791978724 is a deficient number, since it is larger than the sum of its proper divisors (5977353864837).

7969791978724 is an frugal number, since it uses more digits than its factorization.

7969791978724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823086 (or 1411543 counting only the distinct ones).

The product of its digits is 6049137024, while the sum is 85.

The spelling of 7969791978724 in words is "seven trillion, nine hundred sixty-nine billion, seven hundred ninety-one million, nine hundred seventy-eight thousand, seven hundred twenty-four".