8128263313 has 8 divisors (see below), whose sum is σ = 8259545448. Its totient is φ = 7997950464.

The previous prime is 8128263287. The next prime is 8128263317. The reversal of 8128263313 is 3133628218.

It can be written as a sum of positive squares in 4 ways, for example, as 1999252369 + 6129010944 = 44713^2 + 78288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8128263313 - 2⁵ = 8128263281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8128263317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225406 + ... + 258967.

It is an arithmetic number, because the mean of its divisors is an integer number (1032443181).

Almost surely, 2^8128263313 is an apocalyptic number.

It is an amenable number.

8128263313 is a deficient number, since it is larger than the sum of its proper divisors (131282135).

8128263313 is a wasteful number, since it uses less digits than its factorization.

8128263313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484643.

The product of its digits is 41472, while the sum is 37.

The square root of 8128263313 is about 90156.8816730038. The cubic root of 8128263313 is about 2010.6319896619.

It can be divided in two parts, 8128 and 263313, that added together give a square (271441 = 521²).

The spelling of 8128263313 in words is "eight billion, one hundred twenty-eight million, two hundred sixty-three thousand, three hundred thirteen".