191940050000 has 60 divisors (see below), whose sum is σ = 464825178972. Its totient is φ = 76776000000.

The previous prime is 191940049937. The next prime is 191940050021. The reversal of 191940050000 is 50049191.

It can be written as a sum of positive squares in 6 ways, for example, as 106322949184 + 85617100816 = 326072^2 + 292604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1869401 + ... + 1969400.

Almost surely, 2^191940050000 is an apocalyptic number.

191940050000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191940050000 is an abundant number, since it is smaller than the sum of its proper divisors (272885128972).

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

191940050000 is an frugal number, since it uses more digits than its factorization.

191940050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838834 (or 3838808 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

Adding to 191940050000 its reverse (50049191), we get a palindrome (191990099191).

The spelling of 191940050000 in words is "one hundred ninety-one billion, nine hundred forty million, fifty thousand".