8257744672 has 24 divisors (see below), whose sum is σ = 16440108300. Its totient is φ = 4082479104.

The previous prime is 8257744661. The next prime is 8257744681. The reversal of 8257744672 is 2764477528.

It can be written as a sum of positive squares in 2 ways, for example, as 6159738256 + 2098006416 = 78484^2 + 45804^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446897 + ... + 1452592.

Almost surely, 2^8257744672 is an apocalyptic number.

It is an amenable number.

8257744672 is a deficient number, since it is larger than the sum of its proper divisors (8182363628).

8257744672 is a wasteful number, since it uses less digits than its factorization.

8257744672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899588 (or 2899580 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 52.

The square root of 8257744672 is about 90872.1336384263. The cubic root of 8257744672 is about 2021.2520969751.

The spelling of 8257744672 in words is "eight billion, two hundred fifty-seven million, seven hundred forty-four thousand, six hundred seventy-two".