199810544975 has 6 divisors (see below), whose sum is σ = 247765075800. Its totient is φ = 159848435960.

The previous prime is 199810544957. The next prime is 199810545001. The reversal of 199810544975 is 579445018991.

It is a happy number.

It is not a de Polignac number, because 199810544975 - 2²⁶ = 199743436111 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3996210875 + ... + 3996210924.

It is an arithmetic number, because the mean of its divisors is an integer number (41294179300).

Almost surely, 2^199810544975 is an apocalyptic number.

199810544975 is a deficient number, since it is larger than the sum of its proper divisors (47954530825).

199810544975 is an equidigital number, since it uses as much as digits as its factorization.

199810544975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7992421809 (or 7992421804 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 62.

The spelling of 199810544975 in words is "one hundred ninety-nine billion, eight hundred ten million, five hundred forty-four thousand, nine hundred seventy-five".