645064465001 has 12 divisors (see below), whose sum is σ = 739865534016. Its totient is φ = 560925619320.

The previous prime is 645064464983. The next prime is 645064465007. The reversal of 645064465001 is 100564460546.

It is not a de Polignac number, because 645064465001 - 2³⁸ = 370186558057 is a prime.

It is a super-2 number, since 2×645064465001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645064465001.

It is not an unprimeable number, because it can be changed into a prime (645064465007) 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 11 ways as a sum of consecutive naturals, for example, 115890941 + ... + 115896506.

It is an arithmetic number, because the mean of its divisors is an integer number (61655461168).

Almost surely, 2^645064465001 is an apocalyptic number.

It is an amenable number.

645064465001 is a deficient number, since it is larger than the sum of its proper divisors (94801069015).

645064465001 is a wasteful number, since it uses less digits than its factorization.

645064465001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231787492 (or 231787481 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 645064465001 in words is "six hundred forty-five billion, sixty-four million, four hundred sixty-five thousand, one".