213443123661726 has 128 divisors (see below), whose sum is σ = 490273313587200. Its totient is φ = 60683904933120.

The previous prime is 213443123661689. The next prime is 213443123661727. The reversal of 213443123661726 is 627166321344312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213443123661727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75715899145 + ... + 75715901963.

It is an arithmetic number, because the mean of its divisors is an integer number (3830260262400).

Almost surely, 2^{213443123661726} is an apocalyptic number.

213443123661726 is an abundant number, since it is smaller than the sum of its proper divisors (276830189925474).

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

213443123661726 is a wasteful number, since it uses less digits than its factorization.

213443123661726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8334.

The product of its digits is 5225472, while the sum is 51.

The spelling of 213443123661726 in words is "two hundred thirteen trillion, four hundred forty-three billion, one hundred twenty-three million, six hundred sixty-one thousand, seven hundred twenty-six".