217913840057364 has 24 divisors (see below), whose sum is σ = 554689774691808. Its totient is φ = 66034496987040.

The previous prime is 217913840057363. The next prime is 217913840057371. The reversal of 217913840057364 is 463750048319712.

It is a junction number, because it is equal to n+sod(n) for n = 217913840057298 and 217913840057307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217913840057363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825431212207 + ... + 825431212470.

It is an arithmetic number, because the mean of its divisors is an integer number (23112073945492).

It is a 1-persistent number, because it is pandigital, but 2⋅217913840057364 = 435827680114728 is not.

Almost surely, 2^{217913840057364} is an apocalyptic number.

It is an amenable number.

217913840057364 is an abundant number, since it is smaller than the sum of its proper divisors (336775934634444).

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

217913840057364 is a wasteful number, since it uses less digits than its factorization.

217913840057364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650862424695 (or 1650862424693 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 60.

The spelling of 217913840057364 in words is "two hundred seventeen trillion, nine hundred thirteen billion, eight hundred forty million, fifty-seven thousand, three hundred sixty-four".