2056206681 has 16 divisors (see below), whose sum is σ = 3054547200. Its totient is φ = 1367062704.

The previous prime is 2056206671. The next prime is 2056206683. The reversal of 2056206681 is 1866026502.

2056206681 is a `hidden beast` number, since 20 + 5 + 620 + 6 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 2056206681 - 2⁷ = 2056206553 is a prime.

It is a super-2 number, since 2×2056206681² = 8455971829978071522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2056206683) 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, 93846 + ... + 113663.

It is an arithmetic number, because the mean of its divisors is an integer number (190909200).

Almost surely, 2^2056206681 is an apocalyptic number.

It is an amenable number.

2056206681 is a deficient number, since it is larger than the sum of its proper divisors (998340519).

2056206681 is a wasteful number, since it uses less digits than its factorization.

2056206681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207885 (or 207879 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 2056206681 is about 45345.4152147712. The cubic root of 2056206681 is about 1271.6148431154.

The spelling of 2056206681 in words is "two billion, fifty-six million, two hundred six thousand, six hundred eighty-one".