212675569685 has 4 divisors (see below), whose sum is σ = 255210683628. Its totient is φ = 170140455744.

The previous prime is 212675569679. The next prime is 212675569699. The reversal of 212675569685 is 586965576212.

It is a happy number.

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 154487516401 + 58188053284 = 393049^2 + 241222^2 .

It is a cyclic number.

It is not a de Polignac number, because 212675569685 - 2⁶ = 212675569621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21267556964 + ... + 21267556973.

It is an arithmetic number, because the mean of its divisors is an integer number (63802670907).

Almost surely, 2^212675569685 is an apocalyptic number.

It is an amenable number.

212675569685 is a deficient number, since it is larger than the sum of its proper divisors (42535113943).

212675569685 is an equidigital number, since it uses as much as digits as its factorization.

212675569685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42535113942.

The product of its digits is 54432000, while the sum is 62.

The spelling of 212675569685 in words is "two hundred twelve billion, six hundred seventy-five million, five hundred sixty-nine thousand, six hundred eighty-five".