6446064064720 has 40 divisors (see below), whose sum is σ = 17128113087744. Its totient is φ = 2210079107712.

The previous prime is 6446064064697. The next prime is 6446064064721. The reversal of 6446064064720 is 274604606446.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446064064721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5755413784 + ... + 5755414903.

Almost surely, 2^{6446064064720} is an apocalyptic number.

It is an amenable number.

6446064064720 is an abundant number, since it is smaller than the sum of its proper divisors (10682049023024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6446064064720 is a wasteful number, since it uses less digits than its factorization.

6446064064720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11510828707 (or 11510828701 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 49.

The spelling of 6446064064720 in words is "six trillion, four hundred forty-six billion, sixty-four million, sixty-four thousand, seven hundred twenty".