999959651289042 has 16 divisors (see below), whose sum is σ = 2015666698662912. Its totient is φ = 330695317748880.

The previous prime is 999959651288993. The next prime is 999959651289059. The reversal of 999959651289042 is 240982156959999.

It is a super-2 number, since 2×999959651289042² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999959651289042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656141502709 + ... + 656141504232.

It is an arithmetic number, because the mean of its divisors is an integer number (125979168666432).

Almost surely, 2^{999959651289042} is an apocalyptic number.

999959651289042 is an abundant number, since it is smaller than the sum of its proper divisors (1015707047373870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999959651289042 is a wasteful number, since it uses less digits than its factorization.

999959651289042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312283007073.

The product of its (nonzero) digits is 10203667200, while the sum is 87.

The spelling of 999959651289042 in words is "nine hundred ninety-nine trillion, nine hundred fifty-nine billion, six hundred fifty-one million, two hundred eighty-nine thousand, forty-two".