210195419905 has 8 divisors (see below), whose sum is σ = 267071827752. Its totient is φ = 158264786688.

The previous prime is 210195419881. The next prime is 210195419947. The reversal of 210195419905 is 509914591012.

It can be written as a sum of positive squares in 4 ways, for example, as 91407661569 + 118787758336 = 302337^2 + 344656^2 .

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 210195419905 - 2¹¹ = 210195417857 is a prime.

It is a super-2 number, since 2×210195419905² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1236443562 + ... + 1236443731.

It is an arithmetic number, because the mean of its divisors is an integer number (33383978469).

Almost surely, 2^210195419905 is an apocalyptic number.

It is an amenable number.

210195419905 is a deficient number, since it is larger than the sum of its proper divisors (56876407847).

210195419905 is a wasteful number, since it uses less digits than its factorization.

210195419905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472887315.

The product of its (nonzero) digits is 145800, while the sum is 46.

The spelling of 210195419905 in words is "two hundred ten billion, one hundred ninety-five million, four hundred nineteen thousand, nine hundred five".