213361306664634 has 24 divisors (see below), whose sum is σ = 462283413101172. Its totient is φ = 71120346017280.

The previous prime is 213361306664621. The next prime is 213361306664711. The reversal of 213361306664634 is 436466603163312.

It can be written as a sum of positive squares in 2 ways, for example, as 207126871961409 + 6234434703225 = 14391903^2 + 2496885^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8111704 + ... + 22192844.

Almost surely, 2^{213361306664634} is an apocalyptic number.

213361306664634 is an abundant number, since it is smaller than the sum of its proper divisors (248922106436538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213361306664634 is a wasteful number, since it uses less digits than its factorization.

213361306664634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14922942 (or 14922939 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 54.

The spelling of 213361306664634 in words is "two hundred thirteen trillion, three hundred sixty-one billion, three hundred six million, six hundred sixty-four thousand, six hundred thirty-four".