199056558438 has 48 divisors (see below), whose sum is σ = 436093575840. Its totient is φ = 65614879872.

The previous prime is 199056558433. The next prime is 199056558439. The reversal of 199056558438 is 834855650991.

199056558438 is a `hidden beast` number, since 1 + 9 + 90 + 5 + 65 + 58 + 438 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199056558431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1238770 + ... + 1390202.

It is an arithmetic number, because the mean of its divisors is an integer number (9085282830).

Almost surely, 2^199056558438 is an apocalyptic number.

199056558438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

199056558438 is an abundant number, since it is smaller than the sum of its proper divisors (237037017402).

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

199056558438 is a wasteful number, since it uses less digits than its factorization.

199056558438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152253 (or 152250 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 63.

The spelling of 199056558438 in words is "one hundred ninety-nine billion, fifty-six million, five hundred fifty-eight thousand, four hundred thirty-eight".