199108981755 has 48 divisors (see below), whose sum is σ = 348784834944. Its totient is φ = 105065164800.

The previous prime is 199108981739. The next prime is 199108981777. The reversal of 199108981755 is 557189801991.

It is not a de Polignac number, because 199108981755 - 2⁴ = 199108981739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199108981692 and 199108981701.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25038030 + ... + 25045980.

It is an arithmetic number, because the mean of its divisors is an integer number (7266350728).

Almost surely, 2^199108981755 is an apocalyptic number.

199108981755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199108981755 is a deficient number, since it is larger than the sum of its proper divisors (149675853189).

199108981755 is a wasteful number, since it uses less digits than its factorization.

199108981755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13796 (or 13793 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 63.

The spelling of 199108981755 in words is "one hundred ninety-nine billion, one hundred eight million, nine hundred eighty-one thousand, seven hundred fifty-five".