211654964749 has 2 divisors, whose sum is σ = 211654964750. Its totient is φ = 211654964748.

The previous prime is 211654964747. The next prime is 211654964777. The reversal of 211654964749 is 947469456112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210488264100 + 1166700649 = 458790^2 + 34157^2 .

It is a cyclic number.

It is not a de Polignac number, because 211654964749 - 2¹ = 211654964747 is a prime.

Together with 211654964747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211654964693 and 211654964702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211654964743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105827482374 + 105827482375.

It is an arithmetic number, because the mean of its divisors is an integer number (105827482375).

Almost surely, 2^211654964749 is an apocalyptic number.

It is an amenable number.

211654964749 is a deficient number, since it is larger than the sum of its proper divisors (1).

211654964749 is an equidigital number, since it uses as much as digits as its factorization.

211654964749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 58.

The spelling of 211654964749 in words is "two hundred eleven billion, six hundred fifty-four million, nine hundred sixty-four thousand, seven hundred forty-nine".