212726655677 has 2 divisors, whose sum is σ = 212726655678. Its totient is φ = 212726655676.

The previous prime is 212726655653. The next prime is 212726655761. The reversal of 212726655677 is 776556627212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204696524356 + 8030131321 = 452434^2 + 89611^2 .

It is a cyclic number.

It is not a de Polignac number, because 212726655677 - 2²⁴ = 212709878461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212726655077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106363327838 + 106363327839.

It is an arithmetic number, because the mean of its divisors is an integer number (106363327839).

Almost surely, 2^212726655677 is an apocalyptic number.

It is an amenable number.

212726655677 is a deficient number, since it is larger than the sum of its proper divisors (1).

212726655677 is an equidigital number, since it uses as much as digits as its factorization.

212726655677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14817600, while the sum is 56.

The spelling of 212726655677 in words is "two hundred twelve billion, seven hundred twenty-six million, six hundred fifty-five thousand, six hundred seventy-seven".