199812976806758 has 64 divisors (see below), whose sum is σ = 350642274444288. Its totient is φ = 83631519498240.

The previous prime is 199812976806757. The next prime is 199812976806803. The reversal of 199812976806758 is 857608679218991.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199812976806758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199812976806757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227784038 + ... + 228659558.

It is an arithmetic number, because the mean of its divisors is an integer number (5478785538192).

Almost surely, 2^{199812976806758} is an apocalyptic number.

199812976806758 is a deficient number, since it is larger than the sum of its proper divisors (150829297637530).

199812976806758 is a wasteful number, since it uses less digits than its factorization.

199812976806758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877797.

The product of its (nonzero) digits is 6584094720, while the sum is 86.

The spelling of 199812976806758 in words is "one hundred ninety-nine trillion, eight hundred twelve billion, nine hundred seventy-six million, eight hundred six thousand, seven hundred fifty-eight".