2646579664 has 20 divisors (see below), whose sum is σ = 5154322756. Its totient is φ = 1316431872.

The previous prime is 2646579587. The next prime is 2646579671. The reversal of 2646579664 is 4669756462.

It can be written as a sum of positive squares in 2 ways, for example, as 197121600 + 2449458064 = 14040^2 + 49492^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425439 + ... + 431614.

Almost surely, 2^2646579664 is an apocalyptic number.

It is an amenable number.

2646579664 is a deficient number, since it is larger than the sum of its proper divisors (2507743092).

2646579664 is a wasteful number, since it uses less digits than its factorization.

2646579664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857254 (or 857248 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 55.

The square root of 2646579664 is about 51444.9187383944. The cubic root of 2646579664 is about 1383.2318819036.

The spelling of 2646579664 in words is "two billion, six hundred forty-six million, five hundred seventy-nine thousand, six hundred sixty-four".