1648758449 has 16 divisors (see below), whose sum is σ = 1816964352. Its totient is φ = 1486593408.

The previous prime is 1648758437. The next prime is 1648758493. The reversal of 1648758449 is 9448578461.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648758449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1648758394 and 1648758403.

It is not an unprimeable number, because it can be changed into a prime (1648758409) 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 in 15 ways as a sum of consecutive naturals, for example, 341597 + ... + 346389.

It is an arithmetic number, because the mean of its divisors is an integer number (113560272).

Almost surely, 2^1648758449 is an apocalyptic number.

It is an amenable number.

1648758449 is a deficient number, since it is larger than the sum of its proper divisors (168205903).

1648758449 is a wasteful number, since it uses less digits than its factorization.

1648758449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5416.

The product of its digits is 7741440, while the sum is 56.

The square root of 1648758449 is about 40604.9067108890. The cubic root of 1648758449 is about 1181.3692926042.

The spelling of 1648758449 in words is "one billion, six hundred forty-eight million, seven hundred fifty-eight thousand, four hundred forty-nine".