99639041292 has 288 divisors, whose sum is σ = 322163412480. Its totient is φ = 25277184000.

The previous prime is 99639041239. The next prime is 99639041297. The reversal of 99639041292 is 29214093699.

It is not an unprimeable number, because it can be changed into a prime (99639041297) 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 95 ways as a sum of consecutive naturals, for example, 20427958 + ... + 20432834.

It is an arithmetic number, because the mean of its divisors is an integer number (1118622960).

Almost surely, 2^99639041292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99639041292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161081706240).

99639041292 is an abundant number, since it is smaller than the sum of its proper divisors (222524371188).

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

99639041292 is a wasteful number, since it uses less digits than its factorization.

99639041292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181 (or 5176 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 99639041292 in words is "ninety-nine billion, six hundred thirty-nine million, forty-one thousand, two hundred ninety-two".