2489664651 has 4 divisors (see below), whose sum is σ = 3319552872. Its totient is φ = 1659776432.

The previous prime is 2489664623. The next prime is 2489664757. The reversal of 2489664651 is 1564669842.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2489664651 - 2¹⁸ = 2489402507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2489664594 and 2489664603.

It is not an unprimeable number, because it can be changed into a prime (2489664451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414944106 + ... + 414944111.

It is an arithmetic number, because the mean of its divisors is an integer number (829888218).

Almost surely, 2^2489664651 is an apocalyptic number.

2489664651 is a deficient number, since it is larger than the sum of its proper divisors (829888221).

2489664651 is an equidigital number, since it uses as much as digits as its factorization.

2489664651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829888220.

The product of its digits is 2488320, while the sum is 51.

The square root of 2489664651 is about 49896.5394691856. The cubic root of 2489664651 is about 1355.3359281121.

The spelling of 2489664651 in words is "two billion, four hundred eighty-nine million, six hundred sixty-four thousand, six hundred fifty-one".