212077517849 has 2 divisors, whose sum is σ = 212077517850. Its totient is φ = 212077517848.

The previous prime is 212077517833. The next prime is 212077517863. The reversal of 212077517849 is 948715770212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122216664025 + 89860853824 = 349595^2 + 299768^2 .

It is a cyclic number.

It is not a de Polignac number, because 212077517849 - 2⁴ = 212077517833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212077517849.

It is not a weakly prime, because it can be changed into another prime (212071517849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106038758924 + 106038758925.

It is an arithmetic number, because the mean of its divisors is an integer number (106038758925).

Almost surely, 2^212077517849 is an apocalyptic number.

It is an amenable number.

212077517849 is a deficient number, since it is larger than the sum of its proper divisors (1).

212077517849 is an equidigital number, since it uses as much as digits as its factorization.

212077517849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 53.

The spelling of 212077517849 in words is "two hundred twelve billion, seventy-seven million, five hundred seventeen thousand, eight hundred forty-nine".