645287189286 has 32 divisors (see below), whose sum is σ = 1366524891648. Its totient is φ = 202437947520.

The previous prime is 645287189279. The next prime is 645287189297. The reversal of 645287189286 is 682981782546.

645287189286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7857111 + ... + 7938813.

It is an arithmetic number, because the mean of its divisors is an integer number (42703902864).

Almost surely, 2^645287189286 is an apocalyptic number.

645287189286 is an abundant number, since it is smaller than the sum of its proper divisors (721237702362).

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

645287189286 is a wasteful number, since it uses less digits than its factorization.

645287189286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159156.

The product of its digits is 92897280, while the sum is 66.

The spelling of 645287189286 in words is "six hundred forty-five billion, two hundred eighty-seven million, one hundred eighty-nine thousand, two hundred eighty-six".