99791089605 has 12 divisors (see below), whose sum is σ = 172971222060. Its totient is φ = 53221914432.

The previous prime is 99791089603. The next prime is 99791089627. The reversal of 99791089605 is 50698019799.

99791089605 is a `hidden beast` number, since 9 + 9 + 7 + 9 + 10 + 8 + 9 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56301323841 + 43489765764 = 237279^2 + 208542^2 .

It is not a de Polignac number, because 99791089605 - 2¹ = 99791089603 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99791089603) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1108789840 + ... + 1108789929.

It is an arithmetic number, because the mean of its divisors is an integer number (14414268505).

Almost surely, 2^99791089605 is an apocalyptic number.

It is an amenable number.

99791089605 is a deficient number, since it is larger than the sum of its proper divisors (73180132455).

99791089605 is a wasteful number, since it uses less digits than its factorization.

99791089605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217579780 (or 2217579777 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 63.

The spelling of 99791089605 in words is "ninety-nine billion, seven hundred ninety-one million, eighty-nine thousand, six hundred five".