645276944002 has 8 divisors (see below), whose sum is σ = 981548027712. Its totient is φ = 318094268100.

The previous prime is 645276943919. The next prime is 645276944003. The reversal of 645276944002 is 200449672546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (645276944003) 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, 2272101774 + ... + 2272102057.

It is an arithmetic number, because the mean of its divisors is an integer number (122693503464).

Almost surely, 2^645276944002 is an apocalyptic number.

645276944002 is a deficient number, since it is larger than the sum of its proper divisors (336271083710).

645276944002 is a wasteful number, since it uses less digits than its factorization.

645276944002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544203904.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 645276944002 in words is "six hundred forty-five billion, two hundred seventy-six million, nine hundred forty-four thousand, two".