221729136848 has 40 divisors (see below), whose sum is σ = 440439685056. Its totient is φ = 108071724800.

The previous prime is 221729136847. The next prime is 221729136907. The reversal of 221729136848 is 848631927122.

It is a super-2 number, since 2×221729136848² (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 221729136848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221729136847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664103 + ... + 940473.

Almost surely, 2^221729136848 is an apocalyptic number.

It is an amenable number.

221729136848 is a deficient number, since it is larger than the sum of its proper divisors (218710548208).

221729136848 is a wasteful number, since it uses less digits than its factorization.

221729136848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277643 (or 277637 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The spelling of 221729136848 in words is "two hundred twenty-one billion, seven hundred twenty-nine million, one hundred thirty-six thousand, eight hundred forty-eight".