2731575665881 has 2 divisors, whose sum is σ = 2731575665882. Its totient is φ = 2731575665880.

The previous prime is 2731575665879. The next prime is 2731575665911. The reversal of 2731575665881 is 1885665751372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1961848435600 + 769727230281 = 1400660^2 + 877341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731575665881 - 2¹ = 2731575665879 is a prime.

It is a super-2 number, since 2×2731575665881² (a number of 26 digits) contains 22 as substring.

Together with 2731575665879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2731575665851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365787832940 + 1365787832941.

It is an arithmetic number, because the mean of its divisors is an integer number (1365787832941).

Almost surely, 2^{2731575665881} is an apocalyptic number.

It is an amenable number.

2731575665881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731575665881 is an equidigital number, since it uses as much as digits as its factorization.

2731575665881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672000, while the sum is 64.

The spelling of 2731575665881 in words is "two trillion, seven hundred thirty-one billion, five hundred seventy-five million, six hundred sixty-five thousand, eight hundred eighty-one".