645105265336 has 16 divisors (see below), whose sum is σ = 1382368425840. Its totient is φ = 276473685120.

The previous prime is 645105265331. The next prime is 645105265351. The reversal of 645105265336 is 633562501546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645105265331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5759868385 + ... + 5759868496.

It is an arithmetic number, because the mean of its divisors is an integer number (86398026615).

Almost surely, 2^645105265336 is an apocalyptic number.

It is an amenable number.

645105265336 is an abundant number, since it is smaller than the sum of its proper divisors (737263160504).

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

645105265336 is a wasteful number, since it uses less digits than its factorization.

645105265336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11519736894 (or 11519736890 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 645105265336 in words is "six hundred forty-five billion, one hundred five million, two hundred sixty-five thousand, three hundred thirty-six".