99785339892 has 216 divisors, whose sum is σ = 320701006080. Its totient is φ = 25967208960.

The previous prime is 99785339891. The next prime is 99785339903. The reversal of 99785339892 is 29893358799.

99785339892 is a `hidden beast` number, since 9 + 9 + 7 + 8 + 533 + 9 + 89 + 2 = 666.

It is a super-2 number, since 2×99785339892² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99785339892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99785339891) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 875959 + ... + 983297.

It is an arithmetic number, because the mean of its divisors is an integer number (1484726880).

Almost surely, 2^99785339892 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 99785339892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160350503040).

99785339892 is an abundant number, since it is smaller than the sum of its proper divisors (220915666188).

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

99785339892 is a wasteful number, since it uses less digits than its factorization.

99785339892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107411 (or 107399 counting only the distinct ones).

The product of its digits is 264539520, while the sum is 72.

The spelling of 99785339892 in words is "ninety-nine billion, seven hundred eighty-five million, three hundred thirty-nine thousand, eight hundred ninety-two".