199108981756 has 12 divisors (see below), whose sum is σ = 348443854920. Its totient is φ = 99553594640.

The previous prime is 199108981739. The next prime is 199108981777. The reversal of 199108981756 is 657189801991.

It is a super-2 number, since 2×199108981756² (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 3 ways as a sum of consecutive naturals, for example, 691371 + ... + 936061.

It is an arithmetic number, because the mean of its divisors is an integer number (29036987910).

Almost surely, 2^199108981756 is an apocalyptic number.

It is an amenable number.

199108981756 is a deficient number, since it is larger than the sum of its proper divisors (149334873164).

199108981756 is a wasteful number, since it uses less digits than its factorization.

199108981756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448124 (or 448122 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 64.

The spelling of 199108981756 in words is "one hundred ninety-nine billion, one hundred eight million, nine hundred eighty-one thousand, seven hundred fifty-six".