645053564111 has 24 divisors (see below), whose sum is σ = 725680771200. Its totient is φ = 572643807120.

The previous prime is 645053564101. The next prime is 645053564143. The reversal of 645053564111 is 111465350546.

It is not a de Polignac number, because 645053564111 - 2⁶ = 645053564047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645053564101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28079516 + ... + 28102478.

It is an arithmetic number, because the mean of its divisors is an integer number (30236698800).

Almost surely, 2^645053564111 is an apocalyptic number.

645053564111 is a deficient number, since it is larger than the sum of its proper divisors (80627207089).

645053564111 is a wasteful number, since it uses less digits than its factorization.

645053564111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28427 (or 28416 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 645053564111 in words is "six hundred forty-five billion, fifty-three million, five hundred sixty-four thousand, one hundred eleven".