879812981999 has 32 divisors (see below), whose sum is σ = 1062781900800. Its totient is φ = 711493735680.

The previous prime is 879812981987. The next prime is 879812982001. The reversal of 879812981999 is 999189218978.

It is not a de Polignac number, because 879812981999 - 2¹² = 879812977903 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 (879842981999) 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 31 ways as a sum of consecutive naturals, for example, 127192289 + ... + 127199205.

It is an arithmetic number, because the mean of its divisors is an integer number (33211934400).

Almost surely, 2^879812981999 is an apocalyptic number.

879812981999 is a deficient number, since it is larger than the sum of its proper divisors (182968918801).

879812981999 is a wasteful number, since it uses less digits than its factorization.

879812981999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10743.

The product of its digits is 423263232, while the sum is 80.

The spelling of 879812981999 in words is "eight hundred seventy-nine billion, eight hundred twelve million, nine hundred eighty-one thousand, nine hundred ninety-nine".