816687052198 has 16 divisors (see below), whose sum is σ = 1253278223136. Its totient is φ = 399029438080.

The previous prime is 816687052171. The next prime is 816687052199. The reversal of 816687052198 is 891250786618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816687052199) 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 7 ways as a sum of consecutive naturals, for example, 25432261 + ... + 25464352.

It is an arithmetic number, because the mean of its divisors is an integer number (78329888946).

Almost surely, 2^816687052198 is an apocalyptic number.

816687052198 is a deficient number, since it is larger than the sum of its proper divisors (436591170938).

816687052198 is a wasteful number, since it uses less digits than its factorization.

816687052198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50896799.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 816687052198 in words is "eight hundred sixteen billion, six hundred eighty-seven million, fifty-two thousand, one hundred ninety-eight".