2680457891 has 2 divisors, whose sum is σ = 2680457892. Its totient is φ = 2680457890.

The previous prime is 2680457869. The next prime is 2680457903. The reversal of 2680457891 is 1987540862.

2680457891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2680457891 - 2⁶ = 2680457827 is a prime.

It is a super-3 number, since 3×2680457891³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2680459891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340228945 + 1340228946.

It is an arithmetic number, because the mean of its divisors is an integer number (1340228946).

Almost surely, 2^2680457891 is an apocalyptic number.

2680457891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2680457891 is an equidigital number, since it uses as much as digits as its factorization.

2680457891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 2680457891 is about 51773.1387014541. The cubic root of 2680457891 is about 1389.1090146010.

The spelling of 2680457891 in words is "two billion, six hundred eighty million, four hundred fifty-seven thousand, eight hundred ninety-one".