640441444144046 has 32 divisors (see below), whose sum is σ = 1033699788912000. Its totient is φ = 296689212195552.

The previous prime is 640441444144043. The next prime is 640441444144147.

640441444144046 is nontrivially palindromic in base 10.

640441444144046 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-2 number, since 2×640441444144046² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640441444143985 and 640441444144003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640441444144043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904495361 + ... + 905203148.

It is an arithmetic number, because the mean of its divisors is an integer number (32303118403500).

Almost surely, 2^{640441444144046} is an apocalyptic number.

640441444144046 is a deficient number, since it is larger than the sum of its proper divisors (393258344767954).

640441444144046 is a wasteful number, since it uses less digits than its factorization.

640441444144046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809698736.

The product of its (nonzero) digits is 9437184, while the sum is 50.

The spelling of 640441444144046 in words is "six hundred forty trillion, four hundred forty-one billion, four hundred forty-four million, one hundred forty-four thousand, forty-six".