644895949294 has 8 divisors (see below), whose sum is σ = 967395767760. Its totient is φ = 322430693376.

The previous prime is 644895949289. The next prime is 644895949343. The reversal of 644895949294 is 492949598446.

644895949294 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8593939 + ... + 8668654.

It is an arithmetic number, because the mean of its divisors is an integer number (120924470970).

Almost surely, 2^644895949294 is an apocalyptic number.

644895949294 is a deficient number, since it is larger than the sum of its proper divisors (322499818466).

644895949294 is a wasteful number, since it uses less digits than its factorization.

644895949294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17281274.

The product of its digits is 806215680, while the sum is 73.

The spelling of 644895949294 in words is "six hundred forty-four billion, eight hundred ninety-five million, nine hundred forty-nine thousand, two hundred ninety-four".