645000601 has 16 divisors (see below), whose sum is σ = 768061440. Its totient is φ = 530004240.

The previous prime is 645000589. The next prime is 645000607. The reversal of 645000601 is 106000546.

It is a cyclic number.

It is not a de Polignac number, because 645000601 - 2¹¹ = 644998553 is a prime.

It is a super-2 number, since 2×645000601² = 832051550580722402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645000607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9330 + ... + 37108.

It is an arithmetic number, because the mean of its divisors is an integer number (48003840).

Almost surely, 2^645000601 is an apocalyptic number.

It is an amenable number.

645000601 is a deficient number, since it is larger than the sum of its proper divisors (123060839).

645000601 is a wasteful number, since it uses less digits than its factorization.

645000601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27924.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 645000601 is about 25396.8620305738. The cubic root of 645000601 is about 864.0125281284.

The spelling of 645000601 in words is "six hundred forty-five million, six hundred one", and thus it is an aban number.