9978118799 has 16 divisors (see below), whose sum is σ = 10930757760. Its totient is φ = 9033152160.

The previous prime is 9978118747. The next prime is 9978118837.

9978118799 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9978118799 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 (9978118729) 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, 3366092 + ... + 3369054.

It is an arithmetic number, because the mean of its divisors is an integer number (683172360).

Almost surely, 2^9978118799 is an apocalyptic number.

9978118799 is a deficient number, since it is larger than the sum of its proper divisors (952638961).

9978118799 is a wasteful number, since it uses less digits than its factorization.

9978118799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150.

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

The square root of 9978118799 is about 99890.5340810630. The cubic root of 9978118799 is about 2152.8621552254.

The spelling of 9978118799 in words is "nine billion, nine hundred seventy-eight million, one hundred eighteen thousand, seven hundred ninety-nine".