99999599994 has 96 divisors (see below), whose sum is σ = 254597091840. Its totient is φ = 27771206400.

The previous prime is 99999599993. The next prime is 99999600049. The reversal of 99999599994 is 49999599999.

99999599994 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 9 + 599 + 9 + 9 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (99999599993) 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 47 ways as a sum of consecutive naturals, for example, 1364272 + ... + 1435700.

It is an arithmetic number, because the mean of its divisors is an integer number (2652053040).

Almost surely, 2^99999599994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999599994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127298545920).

99999599994 is an abundant number, since it is smaller than the sum of its proper divisors (154597491846).

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

99999599994 is a wasteful number, since it uses less digits than its factorization.

99999599994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71756 (or 71753 counting only the distinct ones).

The product of its digits is 7748409780, while the sum is 90.

The spelling of 99999599994 in words is "ninety-nine billion, nine hundred ninety-nine million, five hundred ninety-nine thousand, nine hundred ninety-four".