199941909268 has 12 divisors (see below), whose sum is σ = 349918267860. Its totient is φ = 99965261312.

The previous prime is 199941909263. The next prime is 199941909269. The reversal of 199941909268 is 862909149991.

It can be written as a sum of positive squares in 2 ways, for example, as 60963560464 + 138978348804 = 246908^2 + 372798^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199941909263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343821 + ... + 1485172.

It is an arithmetic number, because the mean of its divisors is an integer number (29159855655).

Almost surely, 2^199941909268 is an apocalyptic number.

It is an amenable number.

199941909268 is a deficient number, since it is larger than the sum of its proper divisors (149976358592).

199941909268 is a wasteful number, since it uses less digits than its factorization.

199941909268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846666 (or 2846664 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 67.

The spelling of 199941909268 in words is "one hundred ninety-nine billion, nine hundred forty-one million, nine hundred nine thousand, two hundred sixty-eight".