645064354611 has 16 divisors (see below), whose sum is σ = 956512663200. Its totient is φ = 429655107744.

The previous prime is 645064354609. The next prime is 645064354637. The reversal of 645064354611 is 116453460546.

645064354611 is a `hidden beast` number, since 6 + 4 + 50 + 6 + 43 + 546 + 11 = 666.

645064354611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645064354611 - 2¹ = 645064354609 is a prime.

It is a super-2 number, since 2×645064354611² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645064364611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10741596 + ... + 10801481.

It is an arithmetic number, because the mean of its divisors is an integer number (59782041450).

Almost surely, 2^645064354611 is an apocalyptic number.

645064354611 is a deficient number, since it is larger than the sum of its proper divisors (311448308589).

645064354611 is a wasteful number, since it uses less digits than its factorization.

645064354611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21544195 (or 21544189 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 645064354611 in words is "six hundred forty-five billion, sixty-four million, three hundred fifty-four thousand, six hundred eleven".