6446620266446 has 16 divisors (see below), whose sum is σ = 9992608467840. Its totient is φ = 3115974627840.

The previous prime is 6446620266439. The next prime is 6446620266469.

6446620266446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6446620266391 and 6446620266400.

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, 55904591 + ... + 56019786.

It is an arithmetic number, because the mean of its divisors is an integer number (624538029240).

Almost surely, 2^{6446620266446} is an apocalyptic number.

6446620266446 is a deficient number, since it is larger than the sum of its proper divisors (3545988201394).

6446620266446 is a wasteful number, since it uses less digits than its factorization.

6446620266446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111925339.

The product of its (nonzero) digits is 47775744, while the sum is 56.

The spelling of 6446620266446 in words is "six trillion, four hundred forty-six billion, six hundred twenty million, two hundred sixty-six thousand, four hundred forty-six".