640415104442 has 32 divisors (see below), whose sum is σ = 986528415744. Its totient is φ = 311649346800.

The previous prime is 640415104429. The next prime is 640415104453. The reversal of 640415104442 is 244401514046.

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, 103106717 + ... + 103112927.

It is an arithmetic number, because the mean of its divisors is an integer number (30829012992).

Almost surely, 2^640415104442 is an apocalyptic number.

640415104442 is a deficient number, since it is larger than the sum of its proper divisors (346113311302).

640415104442 is a wasteful number, since it uses less digits than its factorization.

640415104442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12194.

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 640415104442 its reverse (244401514046), we get a palindrome (884816618488).

The spelling of 640415104442 in words is "six hundred forty billion, four hundred fifteen million, one hundred four thousand, four hundred forty-two".