440220320645 has 16 divisors (see below), whose sum is σ = 605307064320. Its totient is φ = 301077193344.

The previous prime is 440220320629. The next prime is 440220320681. The reversal of 440220320645 is 546023022044.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 440220320645 - 2⁴ = 440220320629 is a prime.

It is a super-2 number, since 2×440220320645² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16406600 + ... + 16433409.

It is an arithmetic number, because the mean of its divisors is an integer number (37831691520).

Almost surely, 2^440220320645 is an apocalyptic number.

It is an amenable number.

440220320645 is a deficient number, since it is larger than the sum of its proper divisors (165086743675).

440220320645 is a wasteful number, since it uses less digits than its factorization.

440220320645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32840404.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 440220320645 its reverse (546023022044), we get a palindrome (986243342689).

The spelling of 440220320645 in words is "four hundred forty billion, two hundred twenty million, three hundred twenty thousand, six hundred forty-five".