216836441650 has 12 divisors (see below), whose sum is σ = 403315781562. Its totient is φ = 86734576640.

The previous prime is 216836441639. The next prime is 216836441663. The reversal of 216836441650 is 56144638612.

216836441650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 465657²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 199836714961 + 16999726689 = 447031^2 + 130383^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216836441650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2168364367 + ... + 2168364466.

Almost surely, 2^216836441650 is an apocalyptic number.

216836441650 is a deficient number, since it is larger than the sum of its proper divisors (186479339912).

216836441650 is a wasteful number, since it uses less digits than its factorization.

216836441650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336728845 (or 4336728840 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 216836441650 in words is "two hundred sixteen billion, eight hundred thirty-six million, four hundred forty-one thousand, six hundred fifty".