6448556825 has 6 divisors (see below), whose sum is σ = 7996210494. Its totient is φ = 5158845440.

The previous prime is 6448556771. The next prime is 6448556831. The reversal of 6448556825 is 5286558446.

It can be written as a sum of positive squares in 3 ways, for example, as 17799961 + 6430756864 = 4219^2 + 80192^2 .

It is not a de Polignac number, because 6448556825 - 2¹⁰ = 6448555801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128971112 + ... + 128971161.

It is an arithmetic number, because the mean of its divisors is an integer number (1332701749).

Almost surely, 2^6448556825 is an apocalyptic number.

It is an amenable number.

6448556825 is a deficient number, since it is larger than the sum of its proper divisors (1547653669).

6448556825 is a wasteful number, since it uses less digits than its factorization.

6448556825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257942283 (or 257942278 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 53.

The square root of 6448556825 is about 80302.9067033068. The cubic root of 6448556825 is about 1861.3191421692.

The spelling of 6448556825 in words is "six billion, four hundred forty-eight million, five hundred fifty-six thousand, eight hundred twenty-five".