6406644572 has 48 divisors (see below), whose sum is σ = 12033584640. Its totient is φ = 2976697152.

The previous prime is 6406644557. The next prime is 6406644583. The reversal of 6406644572 is 2754466046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3467753 + ... + 3469599.

It is an arithmetic number, because the mean of its divisors is an integer number (250699680).

Almost surely, 2^6406644572 is an apocalyptic number.

It is an amenable number.

6406644572 is a deficient number, since it is larger than the sum of its proper divisors (5626940068).

6406644572 is a wasteful number, since it uses less digits than its factorization.

6406644572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The square root of 6406644572 is about 80041.5178017009. The cubic root of 6406644572 is about 1857.2778397791.

The spelling of 6406644572 in words is "six billion, four hundred six million, six hundred forty-four thousand, five hundred seventy-two".