199721849142 has 16 divisors (see below), whose sum is σ = 399471459840. Its totient is φ = 66569322792.

The previous prime is 199721849069. The next prime is 199721849153. The reversal of 199721849142 is 241948127991.

199721849142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199721849142² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062618 + ... + 1236365.

It is an arithmetic number, because the mean of its divisors is an integer number (24966966240).

Almost surely, 2^199721849142 is an apocalyptic number.

199721849142 is an abundant number, since it is smaller than the sum of its proper divisors (199749610698).

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

199721849142 is a wasteful number, since it uses less digits than its factorization.

199721849142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313467.

The product of its digits is 2612736, while the sum is 57.

The spelling of 199721849142 in words is "one hundred ninety-nine billion, seven hundred twenty-one million, eight hundred forty-nine thousand, one hundred forty-two".