645500301065 has 32 divisors (see below), whose sum is σ = 821606841216. Its totient is φ = 485170283520.

The previous prime is 645500301023. The next prime is 645500301079. The reversal of 645500301065 is 560103005546.

It is a de Polignac number, because none of the positive numbers 2^k-645500301065 is a prime.

It is a super-5 number, since 5×645500301065⁵ (a number of 60 digits) contains 55555 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 147608219 + ... + 147612591.

It is an arithmetic number, because the mean of its divisors is an integer number (25675213788).

Almost surely, 2^645500301065 is an apocalyptic number.

It is an amenable number.

645500301065 is a deficient number, since it is larger than the sum of its proper divisors (176106540151).

645500301065 is a wasteful number, since it uses less digits than its factorization.

645500301065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7049.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 645500301065 in words is "six hundred forty-five billion, five hundred million, three hundred one thousand, sixty-five".