2489865766 has 4 divisors (see below), whose sum is σ = 3734798652. Its totient is φ = 1244932882.

The previous prime is 2489865761. The next prime is 2489865767. The reversal of 2489865766 is 6675689842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6675689842 = 2 ⋅3337844921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489865761) 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 as a sum of consecutive naturals, namely, 622466440 + ... + 622466443.

It is an arithmetic number, because the mean of its divisors is an integer number (933699663).

Almost surely, 2^2489865766 is an apocalyptic number.

2489865766 is a deficient number, since it is larger than the sum of its proper divisors (1244932886).

2489865766 is a wasteful number, since it uses less digits than its factorization.

2489865766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244932885.

The product of its digits is 34836480, while the sum is 61.

The square root of 2489865766 is about 49898.5547486097. The cubic root of 2489865766 is about 1355.3724217882.

The spelling of 2489865766 in words is "two billion, four hundred eighty-nine million, eight hundred sixty-five thousand, seven hundred sixty-six".