616591449 has 12 divisors (see below), whose sum is σ = 909582336. Its totient is φ = 402314712.

The previous prime is 616591447. The next prime is 616591483. The reversal of 616591449 is 944195616.

It is a happy number.

616591449 is a `hidden beast` number, since 6 + 16 + 591 + 4 + 49 = 666.

It is not a de Polignac number, because 616591449 - 2¹ = 616591447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616591441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 728409 + ... + 729254.

It is an arithmetic number, because the mean of its divisors is an integer number (75798528).

Almost surely, 2^616591449 is an apocalyptic number.

It is an amenable number.

616591449 is a deficient number, since it is larger than the sum of its proper divisors (292990887).

616591449 is a wasteful number, since it uses less digits than its factorization.

616591449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457716 (or 1457713 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 616591449 is about 24831.2595129607. The cubic root of 616591449 is about 851.1364034279.

The spelling of 616591449 in words is "six hundred sixteen million, five hundred ninety-one thousand, four hundred forty-nine".