199535273728 has 288 divisors, whose sum is σ = 494484480000. Its totient is φ = 78463365120.

The previous prime is 199535273719. The next prime is 199535273783. The reversal of 199535273728 is 827372535991.

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, 142626373 + ... + 142627771.

It is an arithmetic number, because the mean of its divisors is an integer number (1716960000).

Almost surely, 2^199535273728 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 199535273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247242240000).

199535273728 is an abundant number, since it is smaller than the sum of its proper divisors (294949206272).

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

199535273728 is a wasteful number, since it uses less digits than its factorization.

199535273728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571 (or 1557 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 61.

The spelling of 199535273728 in words is "one hundred ninety-nine billion, five hundred thirty-five million, two hundred seventy-three thousand, seven hundred twenty-eight".