212726655728 has 20 divisors (see below), whose sum is σ = 412166831688. Its totient is φ = 106361021760.

The previous prime is 212726655677. The next prime is 212726655761. The reversal of 212726655728 is 827556627212.

It is a happy number.

It is a Cunningham number, because it is equal to 461223²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 212726655728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807143 + ... + 1037753.

Almost surely, 2^212726655728 is an apocalyptic number.

It is an amenable number.

212726655728 is a deficient number, since it is larger than the sum of its proper divisors (199440175960).

212726655728 is a wasteful number, since it uses less digits than its factorization.

212726655728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288272 (or 288266 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The spelling of 212726655728 in words is "two hundred twelve billion, seven hundred twenty-six million, six hundred fifty-five thousand, seven hundred twenty-eight".