6446606140 has 48 divisors (see below), whose sum is σ = 15346588320. Its totient is φ = 2255005440.

The previous prime is 6446606113. The next prime is 6446606171. The reversal of 6446606140 is 416066446.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6446606140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647551 + ... + 657430.

It is an arithmetic number, because the mean of its divisors is an integer number (319720590).

Almost surely, 2^6446606140 is an apocalyptic number.

It is an amenable number.

6446606140 is an abundant number, since it is smaller than the sum of its proper divisors (8899982180).

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

6446606140 is a wasteful number, since it uses less digits than its factorization.

6446606140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305022 (or 1305020 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 6446606140 is about 80290.7599914212. The cubic root of 6446606140 is about 1861.1314405588.

The spelling of 6446606140 in words is "six billion, four hundred forty-six million, six hundred six thousand, one hundred forty".