211653661144 has 16 divisors (see below), whose sum is σ = 417737489400. Its totient is φ = 100256997312.

The previous prime is 211653661129. The next prime is 211653661187. The reversal of 211653661144 is 441166356112.

It is a junction number, because it is equal to n+sod(n) for n = 211653661097 and 211653661106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696228997 + ... + 696229300.

Almost surely, 2^211653661144 is an apocalyptic number.

It is an amenable number.

211653661144 is a deficient number, since it is larger than the sum of its proper divisors (206083828256).

211653661144 is a wasteful number, since it uses less digits than its factorization.

211653661144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392458322 (or 1392458318 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The spelling of 211653661144 in words is "two hundred eleven billion, six hundred fifty-three million, six hundred sixty-one thousand, one hundred forty-four".