645165503332 has 48 divisors (see below), whose sum is σ = 1304981290368. Its totient is φ = 273366051840.

The previous prime is 645165503293. The next prime is 645165503351. The reversal of 645165503332 is 233305561546.

645165503332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2514918 + ... + 2759554.

It is an arithmetic number, because the mean of its divisors is an integer number (27187110216).

Almost surely, 2^645165503332 is an apocalyptic number.

It is an amenable number.

645165503332 is an abundant number, since it is smaller than the sum of its proper divisors (659815787036).

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

645165503332 is a wasteful number, since it uses less digits than its factorization.

645165503332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245716 (or 245714 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 645165503332 in words is "six hundred forty-five billion, one hundred sixty-five million, five hundred three thousand, three hundred thirty-two".