211600116778 has 32 divisors (see below), whose sum is σ = 328990410000. Its totient is φ = 101999124480.

The previous prime is 211600116719. The next prime is 211600116799. The reversal of 211600116778 is 877611006112.

It can be written as a sum of positive squares in 8 ways, for example, as 12240545769 + 199359571009 = 110637^2 + 446497^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211600116778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13778248 + ... + 13793596.

Almost surely, 2^211600116778 is an apocalyptic number.

211600116778 is a deficient number, since it is larger than the sum of its proper divisors (117390293222).

211600116778 is a wasteful number, since it uses less digits than its factorization.

211600116778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17370.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 211600116778 in words is "two hundred eleven billion, six hundred million, one hundred sixteen thousand, seven hundred seventy-eight".