6448860872 has 8 divisors (see below), whose sum is σ = 12091614150. Its totient is φ = 3224430432.

The previous prime is 6448860863. The next prime is 6448860881. The reversal of 6448860872 is 2780688446.

It is an interprime number because it is at equal distance from previous prime (6448860863) and next prime (6448860881).

It can be written as a sum of positive squares in only one way, i.e., 4271145316 + 2177715556 = 65354^2 + 46666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 403053797 + ... + 403053812.

Almost surely, 2^6448860872 is an apocalyptic number.

It is an amenable number.

6448860872 is a deficient number, since it is larger than the sum of its proper divisors (5642753278).

6448860872 is a wasteful number, since it uses less digits than its factorization.

6448860872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806107615 (or 806107611 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 53.

The square root of 6448860872 is about 80304.7998067363. The cubic root of 6448860872 is about 1861.3483952058.

The spelling of 6448860872 in words is "six billion, four hundred forty-eight million, eight hundred sixty thousand, eight hundred seventy-two".