199999963775738 has 64 divisors (see below), whose sum is σ = 364048265410560. Its totient is φ = 80445139740672.

The previous prime is 199999963775683. The next prime is 199999963775743. The reversal of 199999963775738 is 837577369999991.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155885870 + ... + 157163622.

It is an arithmetic number, because the mean of its divisors is an integer number (5688254147040).

Almost surely, 2^{199999963775738} is an apocalyptic number.

199999963775738 is a deficient number, since it is larger than the sum of its proper divisors (164048301634822).

199999963775738 is a wasteful number, since it uses less digits than its factorization.

199999963775738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279631.

The product of its digits is 393734008080, while the sum is 101.

The spelling of 199999963775738 in words is "one hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred sixty-three million, seven hundred seventy-five thousand, seven hundred thirty-eight".