221647065003456 has 112 divisors (see below), whose sum is σ = 594751201095168. Its totient is φ = 72835600768000.

The previous prime is 221647065003251. The next prime is 221647065003461. The reversal of 221647065003456 is 654300560746122.

It is a junction number, because it is equal to n+sod(n) for n = 221647065003399 and 221647065003408.

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, 161989381 + ... + 163351931.

Almost surely, 2^{221647065003456} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221647065003456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297375600547584).

221647065003456 is an abundant number, since it is smaller than the sum of its proper divisors (373104136091712).

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

221647065003456 is a wasteful number, since it uses less digits than its factorization.

221647065003456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374570 (or 1374560 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 221647065003456 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, sixty-five million, three thousand, four hundred fifty-six".