645053564112 has 160 divisors (see below), whose sum is σ = 1731604896384. Its totient is φ = 206807040000.

The previous prime is 645053564101. The next prime is 645053564143. The reversal of 645053564112 is 211465350546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26864112 + ... + 26888112.

Almost surely, 2^645053564112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645053564112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865802448192).

645053564112 is an abundant number, since it is smaller than the sum of its proper divisors (1086551332272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645053564112 is a wasteful number, since it uses less digits than its factorization.

645053564112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24277 (or 24271 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 645053564112 in words is "six hundred forty-five billion, fifty-three million, five hundred sixty-four thousand, one hundred twelve".