645354624262632 has 128 divisors (see below), whose sum is σ = 1713140454480000. Its totient is φ = 202022734417920.

The previous prime is 645354624262619. The next prime is 645354624262703. The reversal of 645354624262632 is 236262426453546.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13343244 + ... + 38324292.

It is an arithmetic number, because the mean of its divisors is an integer number (13383909800625).

Almost surely, 2^{645354624262632} 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 645354624262632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856570227240000).

645354624262632 is an abundant number, since it is smaller than the sum of its proper divisors (1067785830217368).

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

645354624262632 is a wasteful number, since it uses less digits than its factorization.

645354624262632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24981571 (or 24981567 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 60.

The spelling of 645354624262632 in words is "six hundred forty-five trillion, three hundred fifty-four billion, six hundred twenty-four million, two hundred sixty-two thousand, six hundred thirty-two".