4985680891 has 2 divisors, whose sum is σ = 4985680892. Its totient is φ = 4985680890.

The previous prime is 4985680879. The next prime is 4985680913. The reversal of 4985680891 is 1980865894.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4985680891 is a prime.

It is not a weakly prime, because it can be changed into another prime (4985680801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2492840445 + 2492840446.

It is an arithmetic number, because the mean of its divisors is an integer number (2492840446).

Almost surely, 2^4985680891 is an apocalyptic number.

4985680891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4985680891 is an equidigital number, since it uses as much as digits as its factorization.

4985680891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 58.

The square root of 4985680891 is about 70609.3541324377. The cubic root of 4985680891 is about 1708.3420304698.

The spelling of 4985680891 in words is "four billion, nine hundred eighty-five million, six hundred eighty thousand, eight hundred ninety-one".