645328765382 has 16 divisors (see below), whose sum is σ = 1106568870912. Its totient is φ = 276496724040.

The previous prime is 645328765343. The next prime is 645328765391. The reversal of 645328765382 is 283567823546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6007094 + ... + 6113577.

It is an arithmetic number, because the mean of its divisors is an integer number (69160554432).

Almost surely, 2^645328765382 is an apocalyptic number.

645328765382 is a deficient number, since it is larger than the sum of its proper divisors (461240105530).

645328765382 is a wasteful number, since it uses less digits than its factorization.

645328765382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12124483.

The product of its digits is 58060800, while the sum is 59.

The spelling of 645328765382 in words is "six hundred forty-five billion, three hundred twenty-eight million, seven hundred sixty-five thousand, three hundred eighty-two".