221384370768 has 80 divisors (see below), whose sum is σ = 623970081216. Its totient is φ = 67078789120.

The previous prime is 221384370761. The next prime is 221384370773. The reversal of 221384370768 is 867073483122.

It is a super-2 number, since 2×221384370768² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221384370768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221384370761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6549880 + ... + 6583592.

Almost surely, 2^221384370768 is an apocalyptic number.

It is an amenable number.

221384370768 is an abundant number, since it is smaller than the sum of its proper divisors (402585710448).

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

221384370768 is a wasteful number, since it uses less digits than its factorization.

221384370768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46172 (or 46166 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 221384370768 in words is "two hundred twenty-one billion, three hundred eighty-four million, three hundred seventy thousand, seven hundred sixty-eight".