6440604240446 has 16 divisors (see below), whose sum is σ = 9737437248000. Its totient is φ = 3194805882840.

The previous prime is 6440604240401. The next prime is 6440604240457. The reversal of 6440604240446 is 6440424060446.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6440604240397 and 6440604240406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2596046 + ... + 4429521.

It is an arithmetic number, because the mean of its divisors is an integer number (608589828000).

Almost surely, 2^{6440604240446} is an apocalyptic number.

6440604240446 is a deficient number, since it is larger than the sum of its proper divisors (3296833007554).

6440604240446 is a wasteful number, since it uses less digits than its factorization.

6440604240446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029199.

The product of its (nonzero) digits is 1769472, while the sum is 44.

The spelling of 6440604240446 in words is "six trillion, four hundred forty billion, six hundred four million, two hundred forty thousand, four hundred forty-six".