2128643011 has 16 divisors (see below), whose sum is σ = 2364231168. Its totient is φ = 1916218920.

The previous prime is 2128642951. The next prime is 2128643021. The reversal of 2128643011 is 1103468212.

It is not a de Polignac number, because 2128643011 - 2¹³ = 2128634819 is a prime.

It is a super-2 number, since 2×2128643011² = 9062242136558292242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128643021) 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, 129330 + ... + 144856.

It is an arithmetic number, because the mean of its divisors is an integer number (147764448).

Almost surely, 2^2128643011 is an apocalyptic number.

2128643011 is a deficient number, since it is larger than the sum of its proper divisors (235588157).

2128643011 is a wasteful number, since it uses less digits than its factorization.

2128643011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15663 (or 15641 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2128643011 is about 46137.2193678813. The cubic root of 2128643011 is about 1286.3750588033.

The spelling of 2128643011 in words is "two billion, one hundred twenty-eight million, six hundred forty-three thousand, eleven".