9979559799 has 16 divisors (see below), whose sum is σ = 14519827200. Its totient is φ = 6046508160.

The previous prime is 9979559771. The next prime is 9979559803.

9979559799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9979559799 - 2⁵ = 9979559767 is a prime.

It is a super-2 number, since 2×9979559799² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979559749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81102 + ... + 162900.

It is an arithmetic number, because the mean of its divisors is an integer number (907489200).

Almost surely, 2^9979559799 is an apocalyptic number.

9979559799 is a deficient number, since it is larger than the sum of its proper divisors (4540267401).

9979559799 is a wasteful number, since it uses less digits than its factorization.

9979559799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85510.

The product of its digits is 651015225, while the sum is 78.

The square root of 9979559799 is about 99897.7467163299. The cubic root of 9979559799 is about 2152.9657861503.

It can be divided in two parts, 9979 and 559799, that added together give a triangular number (569778 = T₁₀₆₇).

The spelling of 9979559799 in words is "nine billion, nine hundred seventy-nine million, five hundred fifty-nine thousand, seven hundred ninety-nine".