212636926131557 has 2 divisors, whose sum is σ = 212636926131558. Its totient is φ = 212636926131556.

The previous prime is 212636926131541. The next prime is 212636926131653. The reversal of 212636926131557 is 755131629636212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192882821427076 + 19754104704481 = 13888226^2 + 4444559^2 .

It is a cyclic number.

It is not a de Polignac number, because 212636926131557 - 2⁴ = 212636926131541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212636926131496 and 212636926131505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212636926131857) 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, 106318463065778 + 106318463065779.

It is an arithmetic number, because the mean of its divisors is an integer number (106318463065779).

Almost surely, 2^{212636926131557} is an apocalyptic number.

It is an amenable number.

212636926131557 is a deficient number, since it is larger than the sum of its proper divisors (1).

212636926131557 is an equidigital number, since it uses as much as digits as its factorization.

212636926131557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 59.

The spelling of 212636926131557 in words is "two hundred twelve trillion, six hundred thirty-six billion, nine hundred twenty-six million, one hundred thirty-one thousand, five hundred fifty-seven".