221064904704 has 240 divisors, whose sum is σ = 690176825856. Its totient is φ = 61616947200.

The previous prime is 221064904693. The next prime is 221064904751. The reversal of 221064904704 is 407409460122.

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, 14098789 + ... + 14114459.

Almost surely, 2^221064904704 is an apocalyptic number.

221064904704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221064904704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345088412928).

221064904704 is an abundant number, since it is smaller than the sum of its proper divisors (469111921152).

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

221064904704 is an equidigital number, since it uses as much as digits as its factorization.

221064904704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15750 (or 15724 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 221064904704 in words is "two hundred twenty-one billion, sixty-four million, nine hundred four thousand, seven hundred four".