191749140050 has 24 divisors (see below), whose sum is σ = 384088278756. Its totient is φ = 70799682240.

The previous prime is 191749140031. The next prime is 191749140071. The reversal of 191749140050 is 50041947191.

It can be written as a sum of positive squares in 6 ways, for example, as 66353123281 + 125396016769 = 257591^2 + 354113^2 .

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, 147498689 + ... + 147499988.

Almost surely, 2^191749140050 is an apocalyptic number.

191749140050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191749140050 is an abundant number, since it is smaller than the sum of its proper divisors (192339138706).

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

191749140050 is a wasteful number, since it uses less digits than its factorization.

191749140050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294998702 (or 294998697 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 191749140050 in words is "one hundred ninety-one billion, seven hundred forty-nine million, one hundred forty thousand, fifty".