6458638244 has 6 divisors (see below), whose sum is σ = 11302616934. Its totient is φ = 3229319120.

The previous prime is 6458638231. The next prime is 6458638259. The reversal of 6458638244 is 4428368546.

It can be written as a sum of positive squares in only one way, i.e., 3520998244 + 2937640000 = 59338^2 + 54200^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6458638192 and 6458638201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807329777 + ... + 807329784.

It is an arithmetic number, because the mean of its divisors is an integer number (1883769489).

Almost surely, 2^6458638244 is an apocalyptic number.

It is an amenable number.

6458638244 is a deficient number, since it is larger than the sum of its proper divisors (4843978690).

6458638244 is a wasteful number, since it uses less digits than its factorization.

6458638244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614659565 (or 1614659563 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 50.

The square root of 6458638244 is about 80365.6533850127. The cubic root of 6458638244 is about 1862.2886080758.

The spelling of 6458638244 in words is "six billion, four hundred fifty-eight million, six hundred thirty-eight thousand, two hundred forty-four".