2671856081 has 2 divisors, whose sum is σ = 2671856082. Its totient is φ = 2671856080.

The previous prime is 2671856053. The next prime is 2671856093. The reversal of 2671856081 is 1806581762.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2096815681 + 575040400 = 45791^2 + 23980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2671856081 - 2¹⁸ = 2671593937 is a prime.

It is a super-2 number, since 2×2671856081² = 14277629835153357122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2671856021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335928040 + 1335928041.

It is an arithmetic number, because the mean of its divisors is an integer number (1335928041).

Almost surely, 2^2671856081 is an apocalyptic number.

It is an amenable number.

2671856081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2671856081 is an equidigital number, since it uses as much as digits as its factorization.

2671856081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2671856081 is about 51689.9998162120. Note that the first 3 decimals coincide. The cubic root of 2671856081 is about 1387.6215005578.

The spelling of 2671856081 in words is "two billion, six hundred seventy-one million, eight hundred fifty-six thousand, eighty-one".