217774428060 has 48 divisors (see below), whose sum is σ = 696878171136. Its totient is φ = 49777012032.

The previous prime is 217774428049. The next prime is 217774428089. The reversal of 217774428060 is 60824477712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259254852 + ... + 259255691.

It is an arithmetic number, because the mean of its divisors is an integer number (14518295232).

Almost surely, 2^217774428060 is an apocalyptic number.

217774428060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217774428060 is an abundant number, since it is smaller than the sum of its proper divisors (479103743076).

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

217774428060 is a wasteful number, since it uses less digits than its factorization.

217774428060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518510562 (or 518510560 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 48.

The spelling of 217774428060 in words is "two hundred seventeen billion, seven hundred seventy-four million, four hundred twenty-eight thousand, sixty".