99505742845 has 4 divisors (see below), whose sum is σ = 119406891420. Its totient is φ = 79604594272.

The previous prime is 99505742753. The next prime is 99505742851. The reversal of 99505742845 is 54824750599.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76781084836 + 22724658009 = 277094^2 + 150747^2 .

It is a cyclic number.

It is not a de Polignac number, because 99505742845 - 2³¹ = 97358259197 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 99505742845.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9950574280 + ... + 9950574289.

It is an arithmetic number, because the mean of its divisors is an integer number (29851722855).

Almost surely, 2^99505742845 is an apocalyptic number.

It is an amenable number.

99505742845 is a deficient number, since it is larger than the sum of its proper divisors (19901148575).

99505742845 is a wasteful number, since it uses less digits than its factorization.

99505742845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19901148574.

The product of its (nonzero) digits is 18144000, while the sum is 58.

The spelling of 99505742845 in words is "ninety-nine billion, five hundred five million, seven hundred forty-two thousand, eight hundred forty-five".