212749346673 has 6 divisors (see below), whose sum is σ = 307304611874. Its totient is φ = 141832897776.

The previous prime is 212749346671. The next prime is 212749346683. The reversal of 212749346673 is 376643947212.

It is a happy number.

212749346673 is a `hidden beast` number, since 2 + 1 + 27 + 4 + 93 + 466 + 73 = 666.

212749346673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 205157361249 + 7591985424 = 452943^2 + 87132^2 .

It is not a de Polignac number, because 212749346673 - 2¹ = 212749346671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212749346671) by changing a digit.

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, 11819408140 + ... + 11819408157.

Almost surely, 2^212749346673 is an apocalyptic number.

It is an amenable number.

212749346673 is a deficient number, since it is larger than the sum of its proper divisors (94555265201).

212749346673 is a wasteful number, since it uses less digits than its factorization.

212749346673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638816303 (or 23638816300 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The spelling of 212749346673 in words is "two hundred twelve billion, seven hundred forty-nine million, three hundred forty-six thousand, six hundred seventy-three".