8128201155 has 16 divisors (see below), whose sum is σ = 13077780480. Its totient is φ = 4310821088.

The previous prime is 8128201153. The next prime is 8128201163. The reversal of 8128201155 is 5511028218.

It is a cyclic number.

It is not a de Polignac number, because 8128201155 - 2¹ = 8128201153 is a prime.

It is a super-2 number, since 2×8128201155² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8128201153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1510947 + ... + 1516316.

It is an arithmetic number, because the mean of its divisors is an integer number (817361280).

Almost surely, 2^8128201155 is an apocalyptic number.

8128201155 is a deficient number, since it is larger than the sum of its proper divisors (4949579325).

8128201155 is a wasteful number, since it uses less digits than its factorization.

8128201155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027450.

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 8128201155 is about 90156.5369510165. The cubic root of 8128201155 is about 2010.6268644514.

The spelling of 8128201155 in words is "eight billion, one hundred twenty-eight million, two hundred one thousand, one hundred fifty-five".