221644662203364 has 48 divisors (see below), whose sum is σ = 524954974934208. Its totient is φ = 72774823016448.

The previous prime is 221644662203311. The next prime is 221644662203413. The reversal of 221644662203364 is 463302266446122.

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, 329834677 + ... + 330505980.

It is an arithmetic number, because the mean of its divisors is an integer number (10936561977796).

Almost surely, 2^{221644662203364} is an apocalyptic number.

It is an amenable number.

221644662203364 is an abundant number, since it is smaller than the sum of its proper divisors (303310312730844).

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

221644662203364 is a wasteful number, since it uses less digits than its factorization.

221644662203364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660341084 (or 660341082 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 51.

The spelling of 221644662203364 in words is "two hundred twenty-one trillion, six hundred forty-four billion, six hundred sixty-two million, two hundred three thousand, three hundred sixty-four".