6394976646 has 16 divisors (see below), whose sum is σ = 12791553600. Its totient is φ = 2131392168.

The previous prime is 6394976633. The next prime is 6394976657. The reversal of 6394976646 is 6466794936.

It is a self number, because there is not a number n which added to its sum of digits gives 6394976646.

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, 11176 + ... + 113643.

It is an arithmetic number, because the mean of its divisors is an integer number (799472100).

Almost surely, 2^6394976646 is an apocalyptic number.

6394976646 is an abundant number, since it is smaller than the sum of its proper divisors (6396576954).

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

6394976646 is a wasteful number, since it uses less digits than its factorization.

6394976646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133363.

The product of its digits is 35271936, while the sum is 60.

The square root of 6394976646 is about 79968.5978744157. The cubic root of 6394976646 is about 1856.1496491363.

The spelling of 6394976646 in words is "six billion, three hundred ninety-four million, nine hundred seventy-six thousand, six hundred forty-six".