199674124891 has 8 divisors (see below), whose sum is σ = 201309691968. Its totient is φ = 198040245000.

The previous prime is 199674124883. The next prime is 199674124921. The reversal of 199674124891 is 198421476991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199674124891 - 2³ = 199674124883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199674124841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183585 + ... + 658066.

It is an arithmetic number, because the mean of its divisors is an integer number (25163711496).

Almost surely, 2^199674124891 is an apocalyptic number.

199674124891 is a deficient number, since it is larger than the sum of its proper divisors (1635567077).

199674124891 is a wasteful number, since it uses less digits than its factorization.

199674124891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843593.

The product of its digits is 7838208, while the sum is 61.

The spelling of 199674124891 in words is "one hundred ninety-nine billion, six hundred seventy-four million, one hundred twenty-four thousand, eight hundred ninety-one".