7998118997 has 24 divisors (see below), whose sum is σ = 8907978240. Its totient is φ = 7175036000.

The previous prime is 7998118939. The next prime is 7998119011.

7998118997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7998118997 - 2²⁸ = 7729683541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998118907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4386428 + ... + 4388250.

It is an arithmetic number, because the mean of its divisors is an integer number (371165760).

Almost surely, 2^7998118997 is an apocalyptic number.

It is an amenable number.

7998118997 is a deficient number, since it is larger than the sum of its proper divisors (909859243).

7998118997 is a wasteful number, since it uses less digits than its factorization.

7998118997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305 (or 2294 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 68.

The square root of 7998118997 is about 89432.2033553909. The cubic root of 7998118997 is about 1999.8432374631.

It can be divided in two parts, 799811 and 8997, that added together give a palindrome (808808).

The spelling of 7998118997 in words is "seven billion, nine hundred ninety-eight million, one hundred eighteen thousand, nine hundred ninety-seven".