217870053504 has 64 divisors (see below), whose sum is σ = 592832429280. Its totient is φ = 70852044800.

The previous prime is 217870053497. The next prime is 217870053509. The reversal of 217870053504 is 405350078712.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (217870053509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6903402 + ... + 6934889.

Almost surely, 2^217870053504 is an apocalyptic number.

217870053504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

217870053504 is an abundant number, since it is smaller than the sum of its proper divisors (374962375776).

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

217870053504 is a wasteful number, since it uses less digits than its factorization.

217870053504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13838349 (or 13838337 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 217870053504 in words is "two hundred seventeen billion, eight hundred seventy million, fifty-three thousand, five hundred four".