645645060032 has 56 divisors (see below), whose sum is σ = 1465652014080. Its totient is φ = 276436442880.

The previous prime is 645645060001. The next prime is 645645060059. The reversal of 645645060032 is 230060546546.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237032 + ... + 1160807.

Almost surely, 2^645645060032 is an apocalyptic number.

It is an amenable number.

645645060032 is an abundant number, since it is smaller than the sum of its proper divisors (820006954048).

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

645645060032 is a wasteful number, since it uses less digits than its factorization.

645645060032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398889 (or 1398879 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 645645060032 in words is "six hundred forty-five billion, six hundred forty-five million, sixty thousand, thirty-two".