2491649449 has 8 divisors (see below), whose sum is σ = 2579145728. Its totient is φ = 2405214000.

The previous prime is 2491649431. The next prime is 2491649471. The reversal of 2491649449 is 9449461942.

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 2491649449 - 2¹⁵ = 2491616681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2491649396 and 2491649405.

It is not an unprimeable number, because it can be changed into a prime (2491149449) 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, 260427 + ... + 269824.

It is an arithmetic number, because the mean of its divisors is an integer number (322393216).

Almost surely, 2^2491649449 is an apocalyptic number.

It is an amenable number.

2491649449 is a deficient number, since it is larger than the sum of its proper divisors (87496279).

2491649449 is a wasteful number, since it uses less digits than its factorization.

2491649449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530415.

The product of its digits is 2239488, while the sum is 52.

The square root of 2491649449 is about 49916.4246415947. The cubic root of 2491649449 is about 1355.6959971547.

The spelling of 2491649449 in words is "two billion, four hundred ninety-one million, six hundred forty-nine thousand, four hundred forty-nine".