6446620411636 has 12 divisors (see below), whose sum is σ = 11282058335520. Its totient is φ = 3223175172920.

The previous prime is 6446620411597. The next prime is 6446620411643. The reversal of 6446620411636 is 6361140266446.

It is a self number, because there is not a number n which added to its sum of digits gives 6446620411636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33650770 + ... + 33841801.

It is an arithmetic number, because the mean of its divisors is an integer number (940171527960).

Almost surely, 2^{6446620411636} is an apocalyptic number.

It is an amenable number.

6446620411636 is a deficient number, since it is larger than the sum of its proper divisors (4835437923884).

6446620411636 is a wasteful number, since it uses less digits than its factorization.

6446620411636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67516454 (or 67516452 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 49.

The spelling of 6446620411636 in words is "six trillion, four hundred forty-six billion, six hundred twenty million, four hundred eleven thousand, six hundred thirty-six".