217374138336 has 48 divisors (see below), whose sum is σ = 570949419600. Its totient is φ = 72414578688.

The previous prime is 217374138329. The next prime is 217374138407. The reversal of 217374138336 is 633831473712.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518121 + ... + 838568.

It is an arithmetic number, because the mean of its divisors is an integer number (11894779575).

Almost surely, 2^217374138336 is an apocalyptic number.

It is an amenable number.

217374138336 is an abundant number, since it is smaller than the sum of its proper divisors (353575281264).

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

217374138336 is a wasteful number, since it uses less digits than its factorization.

217374138336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358371 (or 1358363 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 48.

The spelling of 217374138336 in words is "two hundred seventeen billion, three hundred seventy-four million, one hundred thirty-eight thousand, three hundred thirty-six".