221646263534160 has 80 divisors (see below), whose sum is σ = 694823680134720. Its totient is φ = 58441561615360.

The previous prime is 221646263534107. The next prime is 221646263534177. The reversal of 221646263534160 is 61435362646122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×221646263534160² (a number of 29 digits) contains 22 as substring.

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, 5188327506 + ... + 5188370225.

It is an arithmetic number, because the mean of its divisors is an integer number (8685296001684).

Almost surely, 2^{221646263534160} is an apocalyptic number.

221646263534160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221646263534160 is an abundant number, since it is smaller than the sum of its proper divisors (473177416600560).

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

221646263534160 is a wasteful number, since it uses less digits than its factorization.

221646263534160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376697836 (or 10376697830 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 221646263534160 in words is "two hundred twenty-one trillion, six hundred forty-six billion, two hundred sixty-three million, five hundred thirty-four thousand, one hundred sixty".