221604342060400 has 120 divisors (see below), whose sum is σ = 574167314759360. Its totient is φ = 81707733918720.

The previous prime is 221604342060383. The next prime is 221604342060421. The reversal of 221604342060400 is 4060243406122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26366952 + ... + 33740551.

Almost surely, 2^{221604342060400} is an apocalyptic number.

221604342060400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221604342060400 is an abundant number, since it is smaller than the sum of its proper divisors (352562972698960).

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

221604342060400 is a wasteful number, since it uses less digits than its factorization.

221604342060400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60108243 (or 60108232 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 221604342060400 its reverse (4060243406122), we get a palindrome (225664585466522).

The spelling of 221604342060400 in words is "two hundred twenty-one trillion, six hundred four billion, three hundred forty-two million, sixty thousand, four hundred".