221654163261232 has 80 divisors (see below), whose sum is σ = 481648860000000. Its totient is φ = 98111354084352.

The previous prime is 221654163261227. The next prime is 221654163261259. The reversal of 221654163261232 is 232162361456122.

It is a happy 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, 122411232 + ... + 124208767.

It is an arithmetic number, because the mean of its divisors is an integer number (6020610750000).

Almost surely, 2^{221654163261232} is an apocalyptic number.

It is an amenable number.

221654163261232 is an abundant number, since it is smaller than the sum of its proper divisors (259994696738768).

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

221654163261232 is a wasteful number, since it uses less digits than its factorization.

221654163261232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246620198 (or 246620192 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

The spelling of 221654163261232 in words is "two hundred twenty-one trillion, six hundred fifty-four billion, one hundred sixty-three million, two hundred sixty-one thousand, two hundred thirty-two".