6448748257 has 16 divisors (see below), whose sum is σ = 8095196160. Its totient is φ = 5008897872.

The previous prime is 6448748231. The next prime is 6448748281. The reversal of 6448748257 is 7528478446.

It is a cyclic number.

It is not a de Polignac number, because 6448748257 - 2¹⁵ = 6448715489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6448748198 and 6448748207.

It is not an unprimeable number, because it can be changed into a prime (6448748287) 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 15 ways as a sum of consecutive naturals, for example, 1051003 + ... + 1057120.

It is an arithmetic number, because the mean of its divisors is an integer number (505949760).

Almost surely, 2^6448748257 is an apocalyptic number.

It is an amenable number.

6448748257 is a deficient number, since it is larger than the sum of its proper divisors (1646447903).

6448748257 is a wasteful number, since it uses less digits than its factorization.

6448748257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108172.

The product of its digits is 12042240, while the sum is 55.

The square root of 6448748257 is about 80304.0986313899. The cubic root of 6448748257 is about 1861.3375603739.

The spelling of 6448748257 in words is "six billion, four hundred forty-eight million, seven hundred forty-eight thousand, two hundred fifty-seven".