99784950885 has 24 divisors (see below), whose sum is σ = 174547384440. Its totient is φ = 52730393472.

The previous prime is 99784950871. The next prime is 99784950901. The reversal of 99784950885 is 58805948799.

99784950885 is a `hidden beast` number, since 9 + 9 + 78 + 49 + 508 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21025580004 + 78759370881 = 145002^2 + 280641^2 .

It is not a de Polignac number, because 99784950885 - 2⁹ = 99784950373 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 10166854 + ... + 10176663.

It is an arithmetic number, because the mean of its divisors is an integer number (7272807685).

Almost surely, 2^99784950885 is an apocalyptic number.

It is an amenable number.

99784950885 is a deficient number, since it is larger than the sum of its proper divisors (74762433555).

99784950885 is a wasteful number, since it uses less digits than its factorization.

99784950885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20343637 (or 20343634 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 72.

The spelling of 99784950885 in words is "ninety-nine billion, seven hundred eighty-four million, nine hundred fifty thousand, eight hundred eighty-five".