217468841815428 has 24 divisors (see below), whose sum is σ = 579916911508032. Its totient is φ = 62133954804384.

The previous prime is 217468841815411. The next prime is 217468841815453. The reversal of 217468841815428 is 824518148864712.

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, 1294457391675 + ... + 1294457391842.

It is an arithmetic number, because the mean of its divisors is an integer number (24163204646168).

Almost surely, 2^{217468841815428} is an apocalyptic number.

217468841815428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

217468841815428 is an abundant number, since it is smaller than the sum of its proper divisors (362448069692604).

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

217468841815428 is a wasteful number, since it uses less digits than its factorization.

217468841815428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588914783531 (or 2588914783529 counting only the distinct ones).

The product of its digits is 220200960, while the sum is 69.

The spelling of 217468841815428 in words is "two hundred seventeen trillion, four hundred sixty-eight billion, eight hundred forty-one million, eight hundred fifteen thousand, four hundred twenty-eight".