212527078609 has 4 divisors (see below), whose sum is σ = 216011129140. Its totient is φ = 209043028080.

The previous prime is 212527078607. The next prime is 212527078649. The reversal of 212527078609 is 906870725212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91913261584 + 120613817025 = 303172^2 + 347295^2 .

It is a cyclic number.

It is not a de Polignac number, because 212527078609 - 2¹ = 212527078607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212527078607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742025174 + ... + 1742025295.

It is an arithmetic number, because the mean of its divisors is an integer number (54002782285).

Almost surely, 2^212527078609 is an apocalyptic number.

It is an amenable number.

212527078609 is a deficient number, since it is larger than the sum of its proper divisors (3484050531).

212527078609 is an equidigital number, since it uses as much as digits as its factorization.

212527078609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484050530.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 212527078609 in words is "two hundred twelve billion, five hundred twenty-seven million, seventy-eight thousand, six hundred nine".