2645649 has 8 divisors (see below), whose sum is σ = 3919520. Its totient is φ = 1763748.

The previous prime is 2645647. The next prime is 2645651. The reversal of 2645649 is 9465462.

2645649 is a `hidden beast` number, since 2 + 6 + 4 + 5 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (2645647) and next prime (2645651).

It is not a de Polignac number, because 2645649 - 2¹ = 2645647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48967 + ... + 49020.

It is an arithmetic number, because the mean of its divisors is an integer number (489940).

2^2645649 is an apocalyptic number.

It is an amenable number.

2645649 is a deficient number, since it is larger than the sum of its proper divisors (1273871).

2645649 is an equidigital number, since it uses as much as digits as its factorization.

2645649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97996 (or 97990 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2645649 is about 1626.5451115785. The cubic root of 2645649 is about 138.3069726064.

The spelling of 2645649 in words is "two million, six hundred forty-five thousand, six hundred forty-nine".