645330049907 has 16 divisors (see below), whose sum is σ = 684833940000. Its totient is φ = 605998272000.

The previous prime is 645330049901. The next prime is 645330049927. The reversal of 645330049907 is 709940033546.

It is a cyclic number.

It is not a de Polignac number, because 645330049907 - 2⁴ = 645330049891 is a prime.

It is a super-2 number, since 2×645330049907² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645330049901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46658069 + ... + 46671897.

It is an arithmetic number, because the mean of its divisors is an integer number (42802121250).

Almost surely, 2^645330049907 is an apocalyptic number.

645330049907 is a deficient number, since it is larger than the sum of its proper divisors (39503890093).

645330049907 is a wasteful number, since it uses less digits than its factorization.

645330049907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19846.

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 645330049907 in words is "six hundred forty-five billion, three hundred thirty million, forty-nine thousand, nine hundred seven".