199729121944298 has 16 divisors (see below), whose sum is σ = 299634815000520. Its totient is φ = 99850850803200.

The previous prime is 199729121944273. The next prime is 199729121944327. The reversal of 199729121944298 is 892449121927991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 185378109621769 + 14351012322529 = 13615363^2 + 3788273^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022680418 + ... + 1022875698.

Almost surely, 2^{199729121944298} is an apocalyptic number.

199729121944298 is a deficient number, since it is larger than the sum of its proper divisors (99905693056222).

199729121944298 is a wasteful number, since it uses less digits than its factorization.

199729121944298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262873.

The product of its digits is 423263232, while the sum is 77.

The spelling of 199729121944298 in words is "one hundred ninety-nine trillion, seven hundred twenty-nine billion, one hundred twenty-one million, nine hundred forty-four thousand, two hundred ninety-eight".