2128155066 has 16 divisors (see below), whose sum is σ = 4729233600. Its totient is φ = 709385004.

The previous prime is 2128155041. The next prime is 2128155077. The reversal of 2128155066 is 6605518212.

2128155066 is a `hidden beast` number, since 21 + 2 + 81 + 550 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2128155066.

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, 19705086 + ... + 19705193.

It is an arithmetic number, because the mean of its divisors is an integer number (295577100).

Almost surely, 2^2128155066 is an apocalyptic number.

2128155066 is an abundant number, since it is smaller than the sum of its proper divisors (2601078534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2128155066 is a wasteful number, since it uses less digits than its factorization.

2128155066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39410290 (or 39410284 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 2128155066 is about 46131.9310889973. The cubic root of 2128155066 is about 1286.2767601467.

The spelling of 2128155066 in words is "two billion, one hundred twenty-eight million, one hundred fifty-five thousand, sixty-six".