212983764379649 has 2 divisors, whose sum is σ = 212983764379650. Its totient is φ = 212983764379648.

The previous prime is 212983764379601. The next prime is 212983764379667. The reversal of 212983764379649 is 946973467389212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107703195340225 + 105280569039424 = 10378015^2 + 10260632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212983764379649 is a prime.

It is not a weakly prime, because it can be changed into another prime (212983764379849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106491882189824 + 106491882189825.

It is an arithmetic number, because the mean of its divisors is an integer number (106491882189825).

Almost surely, 2^{212983764379649} is an apocalyptic number.

It is an amenable number.

212983764379649 is a deficient number, since it is larger than the sum of its proper divisors (1).

212983764379649 is an equidigital number, since it uses as much as digits as its factorization.

212983764379649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5925685248, while the sum is 80.

The spelling of 212983764379649 in words is "two hundred twelve trillion, nine hundred eighty-three billion, seven hundred sixty-four million, three hundred seventy-nine thousand, six hundred forty-nine".