213375317213766 has 16 divisors (see below), whose sum is σ = 426751611865344. Its totient is φ = 71124942831624.

The previous prime is 213375317213753. The next prime is 213375317213999. The reversal of 213375317213766 is 667312713573312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37873290 + ... + 43140893.

It is an arithmetic number, because the mean of its divisors is an integer number (26671975741584).

Almost surely, 2^{213375317213766} is an apocalyptic number.

213375317213766 is an abundant number, since it is smaller than the sum of its proper divisors (213376294651578).

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

213375317213766 is a wasteful number, since it uses less digits than its factorization.

213375317213766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81453155.

The product of its digits is 20003760, while the sum is 57.

The spelling of 213375317213766 in words is "two hundred thirteen trillion, three hundred seventy-five billion, three hundred seventeen million, two hundred thirteen thousand, seven hundred sixty-six".