8128268805 has 8 divisors (see below), whose sum is σ = 13005230112. Its totient is φ = 4335076688.

The previous prime is 8128268749. The next prime is 8128268833. The reversal of 8128268805 is 5088628218.

It is a happy number.

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 8128268805 - 2⁸ = 8128268549 is a prime.

It is a super-2 number, since 2×8128268805² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270942279 + ... + 270942308.

It is an arithmetic number, because the mean of its divisors is an integer number (1625653764).

Almost surely, 2^8128268805 is an apocalyptic number.

It is an amenable number.

8128268805 is a deficient number, since it is larger than the sum of its proper divisors (4876961307).

8128268805 is a wasteful number, since it uses less digits than its factorization.

8128268805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541884595.

The product of its (nonzero) digits is 491520, while the sum is 48.

The square root of 8128268805 is about 90156.9121310174. The cubic root of 8128268805 is about 2010.6324425011.

The spelling of 8128268805 in words is "eight billion, one hundred twenty-eight million, two hundred sixty-eight thousand, eight hundred five".