2643107881 has 2 divisors, whose sum is σ = 2643107882. Its totient is φ = 2643107880.

The previous prime is 2643107867. The next prime is 2643107891. The reversal of 2643107881 is 1887013462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2531699856 + 111408025 = 50316^2 + 10555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643107881 is a prime.

It is a super-2 number, since 2×2643107881² = 13972038541208620322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2643107801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321553940 + 1321553941.

It is an arithmetic number, because the mean of its divisors is an integer number (1321553941).

Almost surely, 2^2643107881 is an apocalyptic number.

It is an amenable number.

2643107881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643107881 is an equidigital number, since it uses as much as digits as its factorization.

2643107881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 2643107881 is about 51411.1649449806. The cubic root of 2643107881 is about 1382.6267760750.

The spelling of 2643107881 in words is "two billion, six hundred forty-three million, one hundred seven thousand, eight hundred eighty-one".