7997972797997 has 96 divisors (see below), whose sum is σ = 10646343993600. Its totient is φ = 5942466173952.

The previous prime is 7997972797981. The next prime is 7997972798009.

It is a happy number.

7997972797997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7997972797997 - 2⁴ = 7997972797981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997972797957) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 699301163 + ... + 699312599.

It is an arithmetic number, because the mean of its divisors is an integer number (110899416600).

Almost surely, 2^{7997972797997} is an apocalyptic number.

It is an amenable number.

7997972797997 is a deficient number, since it is larger than the sum of its proper divisors (2648371195603).

7997972797997 is a wasteful number, since it uses less digits than its factorization.

7997972797997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355 (or 12348 counting only the distinct ones).

The product of its digits is 125047004418, while the sum is 98.

The spelling of 7997972797997 in words is "seven trillion, nine hundred ninety-seven billion, nine hundred seventy-two million, seven hundred ninety-seven thousand, nine hundred ninety-seven".