221042167654 has 72 divisors (see below), whose sum is σ = 424152401400. Its totient is φ = 86078583360.

The previous prime is 221042167609. The next prime is 221042167663. The reversal of 221042167654 is 456761240122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37788522 + ... + 37794370.

It is an arithmetic number, because the mean of its divisors is an integer number (5891005575).

Almost surely, 2^221042167654 is an apocalyptic number.

221042167654 is a deficient number, since it is larger than the sum of its proper divisors (203110233746).

221042167654 is a wasteful number, since it uses less digits than its factorization.

221042167654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9074 (or 9056 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 221042167654 in words is "two hundred twenty-one billion, forty-two million, one hundred sixty-seven thousand, six hundred fifty-four".