645303165216 has 96 divisors (see below), whose sum is σ = 1749427642368. Its totient is φ = 208059429120.

The previous prime is 645303165203. The next prime is 645303165217. The reversal of 645303165216 is 612561303546.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (645303165217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6086935 + ... + 6192041.

It is an arithmetic number, because the mean of its divisors is an integer number (18223204608).

Almost surely, 2^645303165216 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 645303165216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874713821184).

645303165216 is an abundant number, since it is smaller than the sum of its proper divisors (1104124477152).

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

645303165216 is a wasteful number, since it uses less digits than its factorization.

645303165216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107214 (or 107206 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 645303165216 in words is "six hundred forty-five billion, three hundred three million, one hundred sixty-five thousand, two hundred sixteen".