191998339690000 has 200 divisors, whose sum is σ = 466141987190880. Its totient is φ = 76585601664000.

The previous prime is 191998339689943. The next prime is 191998339690033. The reversal of 191998339690000 is 96933899191.

191998339690000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (200).

It is a super-2 number, since 2×191998339690000² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191998339689899 and 191998339689908.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9254259627 + ... + 9254280373.

Almost surely, 2^{191998339690000} is an apocalyptic number.

191998339690000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191998339690000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233070993595440).

191998339690000 is an abundant number, since it is smaller than the sum of its proper divisors (274143647500880).

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

191998339690000 is a wasteful number, since it uses less digits than its factorization.

191998339690000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23307 (or 23286 counting only the distinct ones).

The product of its (nonzero) digits is 25509168, while the sum is 67.

The spelling of 191998339690000 in words is "one hundred ninety-one trillion, nine hundred ninety-eight billion, three hundred thirty-nine million, six hundred ninety thousand".