2646112891 has 2 divisors, whose sum is σ = 2646112892. Its totient is φ = 2646112890.

The previous prime is 2646112867. The next prime is 2646112897. The reversal of 2646112891 is 1982116462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2646112891 - 2⁹ = 2646112379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2646112897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323056445 + 1323056446.

It is an arithmetic number, because the mean of its divisors is an integer number (1323056446).

Almost surely, 2^2646112891 is an apocalyptic number.

2646112891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646112891 is an equidigital number, since it uses as much as digits as its factorization.

2646112891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 2646112891 is about 51440.3819095465. The cubic root of 2646112891 is about 1383.1505576614.

The spelling of 2646112891 in words is "two billion, six hundred forty-six million, one hundred twelve thousand, eight hundred ninety-one".