212661396608 has 16 divisors (see below), whose sum is σ = 423661376310. Its totient is φ = 106330698240.

The previous prime is 212661396599. The next prime is 212661396613. The reversal of 212661396608 is 806693166212.

It can be written as a sum of positive squares in only one way, i.e., 205978007104 + 6683389504 = 453848^2 + 81752^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830708453 + ... + 830708708.

Almost surely, 2^212661396608 is an apocalyptic number.

It is an amenable number.

212661396608 is a deficient number, since it is larger than the sum of its proper divisors (210999979702).

212661396608 is an equidigital number, since it uses as much as digits as its factorization.

212661396608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661417175 (or 1661417163 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 212661396608 in words is "two hundred twelve billion, six hundred sixty-one million, three hundred ninety-six thousand, six hundred eight".