729442572981 has 32 divisors (see below), whose sum is σ = 999883315200. Its totient is φ = 472758249600.

The previous prime is 729442572961. The next prime is 729442572997. The reversal of 729442572981 is 189275244927.

It is not a de Polignac number, because 729442572981 - 2¹⁷ = 729442441909 is a prime.

It is a super-2 number, since 2×729442572981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729442572961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36662046 + ... + 36681936.

It is an arithmetic number, because the mean of its divisors is an integer number (31246353600).

Almost surely, 2^729442572981 is an apocalyptic number.

It is an amenable number.

729442572981 is a deficient number, since it is larger than the sum of its proper divisors (270440742219).

729442572981 is a wasteful number, since it uses less digits than its factorization.

729442572981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21257.

The product of its digits is 20321280, while the sum is 60.

The spelling of 729442572981 in words is "seven hundred twenty-nine billion, four hundred forty-two million, five hundred seventy-two thousand, nine hundred eighty-one".