2644651 has 4 divisors (see below), whose sum is σ = 2660112. Its totient is φ = 2629192.

The previous prime is 2644637. The next prime is 2644657. The reversal of 2644651 is 1564462.

2644651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1564462 = 2 ⋅782231.

It is a cyclic number.

It is not a de Polignac number, because 2644651 - 2⁵ = 2644619 is a prime.

It is a Duffinian number.

2644651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2644657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7471 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (665028).

2^2644651 is an apocalyptic number.

2644651 is a deficient number, since it is larger than the sum of its proper divisors (15461).

2644651 is a wasteful number, since it uses less digits than its factorization.

2644651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15460.

The product of its digits is 5760, while the sum is 28.

The square root of 2644651 is about 1626.2382974214. The cubic root of 2644651 is about 138.2895795561.

The spelling of 2644651 in words is "two million, six hundred forty-four thousand, six hundred fifty-one".