3198540866191 has 4 divisors (see below), whose sum is σ = 3489317308584. Its totient is φ = 2907764423800.

The previous prime is 3198540866179. The next prime is 3198540866203. The reversal of 3198540866191 is 1916680458913.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3198540866179) and next prime (3198540866203).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3198540866191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3198540866141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145388221180 + ... + 145388221201.

It is an arithmetic number, because the mean of its divisors is an integer number (872329327146).

Almost surely, 2^{3198540866191} is an apocalyptic number.

3198540866191 is a deficient number, since it is larger than the sum of its proper divisors (290776442393).

3198540866191 is a wasteful number, since it uses less digits than its factorization.

3198540866191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290776442392.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 3198540866191 in words is "three trillion, one hundred ninety-eight billion, five hundred forty million, eight hundred sixty-six thousand, one hundred ninety-one".