2127861801 has 12 divisors (see below), whose sum is σ = 3310007428. Its totient is φ = 1309453344.

The previous prime is 2127861781. The next prime is 2127861809. The reversal of 2127861801 is 1081687212.

It can be written as a sum of positive squares in 2 ways, for example, as 706496400 + 1421365401 = 26580^2 + 37701^2 .

It is not a de Polignac number, because 2127861801 - 2¹¹ = 2127859753 is a prime.

It is a super-3 number, since 3×2127861801³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2127861809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9093310 + ... + 9093543.

Almost surely, 2^2127861801 is an apocalyptic number.

It is an amenable number.

2127861801 is a deficient number, since it is larger than the sum of its proper divisors (1182145627).

2127861801 is a wasteful number, since it uses less digits than its factorization.

2127861801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186872 (or 18186869 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 2127861801 is about 46128.7524327290. The cubic root of 2127861801 is about 1286.2176733993.

The spelling of 2127861801 in words is "two billion, one hundred twenty-seven million, eight hundred sixty-one thousand, eight hundred one".