99911939832 has 128 divisors (see below), whose sum is σ = 290176128000. Its totient is φ = 31792590720.

The previous prime is 99911939797. The next prime is 99911939851. The reversal of 99911939832 is 23893911999.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 99911939832.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2508957 + ... + 2548467.

It is an arithmetic number, because the mean of its divisors is an integer number (2267001000).

Almost surely, 2^99911939832 is an apocalyptic number.

99911939832 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is a pronic number, being equal to 316088×316089.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99911939832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145088064000).

99911939832 is an abundant number, since it is smaller than the sum of its proper divisors (190264188168).

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

99911939832 is a wasteful number, since it uses less digits than its factorization.

99911939832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40058 (or 40048 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 63.

The spelling of 99911939832 in words is "ninety-nine billion, nine hundred eleven million, nine hundred thirty-nine thousand, eight hundred thirty-two".