6448653081 has 28 divisors (see below), whose sum is σ = 10412307108. Its totient is φ = 3968396064.

The previous prime is 6448653059. The next prime is 6448653103. The reversal of 6448653081 is 1803568446.

6448653081 is a `hidden beast` number, since 64 + 486 + 5 + 30 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (6448653059) and next prime (6448653103).

It can be written as a sum of positive squares in 2 ways, for example, as 2974611600 + 3474041481 = 54540^2 + 58941^2 .

It is not a de Polignac number, because 6448653081 - 2¹³ = 6448644889 is a prime.

It is a super-2 number, since 2×6448653081² = 83170253118181585122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6448653481) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 330750 + ... + 349703.

It is an arithmetic number, because the mean of its divisors is an integer number (371868111).

Almost surely, 2^6448653081 is an apocalyptic number.

It is an amenable number.

6448653081 is a deficient number, since it is larger than the sum of its proper divisors (3963654027).

6448653081 is an equidigital number, since it uses as much as digits as its factorization.

6448653081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680484 (or 680469 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 6448653081 is about 80303.5060318041. The cubic root of 6448653081 is about 1861.3284032720.

The spelling of 6448653081 in words is "six billion, four hundred forty-eight million, six hundred fifty-three thousand, eighty-one".