2489997649 has 8 divisors (see below), whose sum is σ = 2505902400. Its totient is φ = 2474127216.

The previous prime is 2489997647. The next prime is 2489997737. The reversal of 2489997649 is 9467999842.

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

It is a cyclic number.

It is not a de Polignac number, because 2489997649 - 2¹ = 2489997647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2489997647) 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, 145734 + ... + 161920.

It is an arithmetic number, because the mean of its divisors is an integer number (313237800).

Almost surely, 2^2489997649 is an apocalyptic number.

It is an amenable number.

2489997649 is a deficient number, since it is larger than the sum of its proper divisors (15904751).

2489997649 is a wasteful number, since it uses less digits than its factorization.

2489997649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17159.

The product of its digits is 70543872, while the sum is 67.

The square root of 2489997649 is about 49899.8762423315. The cubic root of 2489997649 is about 1355.3963517831.

The spelling of 2489997649 in words is "two billion, four hundred eighty-nine million, nine hundred ninety-seven thousand, six hundred forty-nine".