729531645 has 8 divisors (see below), whose sum is σ = 1167250656. Its totient is φ = 389083536.

The previous prime is 729531643. The next prime is 729531653. The reversal of 729531645 is 546135927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 729531645 - 2¹ = 729531643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 729531597 and 729531606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729531643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24317707 + ... + 24317736.

It is an arithmetic number, because the mean of its divisors is an integer number (145906332).

Almost surely, 2^729531645 is an apocalyptic number.

It is an amenable number.

729531645 is a deficient number, since it is larger than the sum of its proper divisors (437719011).

729531645 is a wasteful number, since it uses less digits than its factorization.

729531645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48635451.

The product of its digits is 226800, while the sum is 42.

The square root of 729531645 is about 27009.8434834414. The cubic root of 729531645 is about 900.2187307872.

The spelling of 729531645 in words is "seven hundred twenty-nine million, five hundred thirty-one thousand, six hundred forty-five".