999990000026 has 32 divisors (see below), whose sum is σ = 1659923753040. Its totient is φ = 449672380416.

The previous prime is 999990000017. The next prime is 999990000067. The reversal of 999990000026 is 620000099999.

It is a Cunningham number, because it is equal to 999995²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 449032669801 + 550957330225 = 670099^2 + 742265^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5132135 + ... + 5323418.

Almost surely, 2^999990000026 is an apocalyptic number.

999990000026 is a deficient number, since it is larger than the sum of its proper divisors (659933753014).

999990000026 is a wasteful number, since it uses less digits than its factorization.

999990000026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10455698.

The product of its (nonzero) digits is 708588, while the sum is 53.

The spelling of 999990000026 in words is "nine hundred ninety-nine billion, nine hundred ninety million, twenty-six", and thus it is an aban number.