212726655729 has 45 divisors (see below), whose sum is σ = 369709291611. Its totient is φ = 121541484960.

The previous prime is 212726655677. The next prime is 212726655761. The reversal of 212726655729 is 927556627212.

The square root of 212726655729 is 461223.

It is a perfect power (a square), and thus also a powerful number.

212726655729 is a `hidden beast` number, since 2 + 1 + 2 + 7 + 2 + 6 + 65 + 572 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58110129 + 212668545600 = 7623^2 + 461160^2 .

It is not a de Polignac number, because 212726655729 - 2⁷ = 212726655601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212726657729) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 29053389 + ... + 29060709.

Almost surely, 2^212726655729 is an apocalyptic number.

212726655729 is the 461223-rd square number.

212726655729 is the 230612-nd centered octagonal number.

It is an amenable number.

212726655729 is a deficient number, since it is larger than the sum of its proper divisors (156982635882).

212726655729 is an frugal number, since it uses more digits than its factorization.

212726655729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14668 (or 7331 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 212726655729 in words is "two hundred twelve billion, seven hundred twenty-six million, six hundred fifty-five thousand, seven hundred twenty-nine".