2489643745 has 8 divisors (see below), whose sum is σ = 2988072360. Its totient is φ = 1991381760.

The previous prime is 2489643733. The next prime is 2489643749. The reversal of 2489643745 is 5473469842.

It can be written as a sum of positive squares in 4 ways, for example, as 1668477409 + 821166336 = 40847^2 + 28656^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2489643745 - 2⁷ = 2489643617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2489643692 and 2489643701.

It is not an unprimeable number, because it can be changed into a prime (2489643749) 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, 6010 + ... + 70819.

It is an arithmetic number, because the mean of its divisors is an integer number (373509045).

Almost surely, 2^2489643745 is an apocalyptic number.

It is an amenable number.

2489643745 is a deficient number, since it is larger than the sum of its proper divisors (498428615).

2489643745 is an equidigital number, since it uses as much as digits as its factorization.

2489643745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83315.

The product of its digits is 5806080, while the sum is 52.

The square root of 2489643745 is about 49896.3299752597. The cubic root of 2489643745 is about 1355.3321344644.

The spelling of 2489643745 in words is "two billion, four hundred eighty-nine million, six hundred forty-three thousand, seven hundred forty-five".