645416747 has 8 divisors (see below), whose sum is σ = 683906976. Its totient is φ = 606984832.

The previous prime is 645416729. The next prime is 645416773. The reversal of 645416747 is 747614546.

645416747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 645416747 - 2¹⁴ = 645400363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645416698 and 645416707.

It is not an unprimeable number, because it can be changed into a prime (645416797) 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, 9353 + ... + 37125.

It is an arithmetic number, because the mean of its divisors is an integer number (85488372).

Almost surely, 2^645416747 is an apocalyptic number.

645416747 is a deficient number, since it is larger than the sum of its proper divisors (38490229).

645416747 is a wasteful number, since it uses less digits than its factorization.

645416747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29157.

The product of its digits is 564480, while the sum is 44.

The square root of 645416747 is about 25405.0535720750. The cubic root of 645416747 is about 864.1983047297.

The spelling of 645416747 in words is "six hundred forty-five million, four hundred sixteen thousand, seven hundred forty-seven".