729548567921 has 16 divisors (see below), whose sum is σ = 748416092160. Its totient is φ = 710974817280.

The previous prime is 729548567903. The next prime is 729548567939. The reversal of 729548567921 is 129765845927.

It is an interprime number because it is at equal distance from previous prime (729548567903) and next prime (729548567939).

It is a cyclic number.

It is not a de Polignac number, because 729548567921 - 2¹⁰ = 729548566897 is a prime.

It is a super-2 number, since 2×729548567921² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729548567971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1981856 + ... + 2320958.

It is an arithmetic number, because the mean of its divisors is an integer number (46776005760).

Almost surely, 2^729548567921 is an apocalyptic number.

It is an amenable number.

729548567921 is a deficient number, since it is larger than the sum of its proper divisors (18867524239).

729548567921 is a wasteful number, since it uses less digits than its factorization.

729548567921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339536.

The product of its digits is 76204800, while the sum is 65.

The spelling of 729548567921 in words is "seven hundred twenty-nine billion, five hundred forty-eight million, five hundred sixty-seven thousand, nine hundred twenty-one".