645363829 has 8 divisors (see below), whose sum is σ = 705178080. Its totient is φ = 585740400.

The previous prime is 645363827. The next prime is 645363839. The reversal of 645363829 is 928363546.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 645363829 - 2¹ = 645363827 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645363827) 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, 40582 + ... + 54199.

It is an arithmetic number, because the mean of its divisors is an integer number (88147260).

Almost surely, 2^645363829 is an apocalyptic number.

It is an amenable number.

645363829 is a deficient number, since it is larger than the sum of its proper divisors (59814251).

645363829 is a wasteful number, since it uses less digits than its factorization.

645363829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95411.

The product of its digits is 933120, while the sum is 46.

The square root of 645363829 is about 25404.0120650263. The cubic root of 645363829 is about 864.1746854191.

The spelling of 645363829 in words is "six hundred forty-five million, three hundred sixty-three thousand, eight hundred twenty-nine".