640244442046 has 16 divisors (see below), whose sum is σ = 1052937417600. Its totient is φ = 289557785880.

The previous prime is 640244442041. The next prime is 640244442049.

It is a happy number.

640244442046 is nontrivially palindromic in base 10.

640244442046 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×640244442046³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640244442041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73116276 + ... + 73125031.

It is an arithmetic number, because the mean of its divisors is an integer number (65808588600).

Almost surely, 2^640244442046 is an apocalyptic number.

640244442046 is a deficient number, since it is larger than the sum of its proper divisors (412692975554).

640244442046 is a wasteful number, since it uses less digits than its factorization.

640244442046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146241519.

The product of its (nonzero) digits is 589824, while the sum is 40.

The spelling of 640244442046 in words is "six hundred forty billion, two hundred forty-four million, four hundred forty-two thousand, forty-six".