2505456664 has 16 divisors (see below), whose sum is σ = 4698401400. Its totient is φ = 1252549632.

The previous prime is 2505456661. The next prime is 2505456697. The reversal of 2505456664 is 4666545052.

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 2505456664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505456661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51672 + ... + 87640.

Almost surely, 2^2505456664 is an apocalyptic number.

It is an amenable number.

2505456664 is a deficient number, since it is larger than the sum of its proper divisors (2192944736).

2505456664 is a wasteful number, since it uses less digits than its factorization.

2505456664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44682 (or 44678 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

The square root of 2505456664 is about 50054.5368972684. The cubic root of 2505456664 is about 1358.1955350730.

It can be divided in two parts, 25054 and 56664, that added together give a palindrome (81718).

The spelling of 2505456664 in words is "two billion, five hundred five million, four hundred fifty-six thousand, six hundred sixty-four".