221268489738 has 64 divisors (see below), whose sum is σ = 484924527360. Its totient is φ = 66996421632.

The previous prime is 221268489719. The next prime is 221268489779. The reversal of 221268489738 is 837984862122.

It is a super-2 number, since 2×221268489738² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7904595 + ... + 7932537.

It is an arithmetic number, because the mean of its divisors is an integer number (7576945740).

Almost surely, 2^221268489738 is an apocalyptic number.

221268489738 is an abundant number, since it is smaller than the sum of its proper divisors (263656037622).

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

221268489738 is a wasteful number, since it uses less digits than its factorization.

221268489738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30671.

The product of its digits is 18579456, while the sum is 60.

The spelling of 221268489738 in words is "two hundred twenty-one billion, two hundred sixty-eight million, four hundred eighty-nine thousand, seven hundred thirty-eight".