199942843555 has 48 divisors (see below), whose sum is σ = 301821768864. Its totient is φ = 126031610880.

The previous prime is 199942843531. The next prime is 199942843567. The reversal of 199942843555 is 555348249991.

199942843555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199942843555 - 2⁵ = 199942843523 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 637344 + ... + 897826.

It is an arithmetic number, because the mean of its divisors is an integer number (6287953518).

Almost surely, 2^199942843555 is an apocalyptic number.

199942843555 is a deficient number, since it is larger than the sum of its proper divisors (101878925309).

199942843555 is a wasteful number, since it uses less digits than its factorization.

199942843555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260756 (or 260749 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 64.

The spelling of 199942843555 in words is "one hundred ninety-nine billion, nine hundred forty-two million, eight hundred forty-three thousand, five hundred fifty-five".