220729727644 has 12 divisors (see below), whose sum is σ = 386303074864. Its totient is φ = 110357420544.

The previous prime is 220729727633. The next prime is 220729727681. The reversal of 220729727644 is 446727927022.

It is a super-2 number, since 2×220729727644² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220729727591 and 220729727600.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1793829 + ... + 1912924.

Almost surely, 2^220729727644 is an apocalyptic number.

It is an amenable number.

220729727644 is a deficient number, since it is larger than the sum of its proper divisors (165573347220).

220729727644 is a wasteful number, since it uses less digits than its factorization.

220729727644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721644 (or 3721642 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 52.

The spelling of 220729727644 in words is "two hundred twenty billion, seven hundred twenty-nine million, seven hundred twenty-seven thousand, six hundred forty-four".