4557788891 has 2 divisors, whose sum is σ = 4557788892. Its totient is φ = 4557788890.

The previous prime is 4557788783. The next prime is 4557788897. The reversal of 4557788891 is 1988877554.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4557788891 is a prime.

It is not a weakly prime, because it can be changed into another prime (4557788897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2278894445 + 2278894446.

It is an arithmetic number, because the mean of its divisors is an integer number (2278894446).

Almost surely, 2^4557788891 is an apocalyptic number.

4557788891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4557788891 is an equidigital number, since it uses as much as digits as its factorization.

4557788891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22579200, while the sum is 62.

The square root of 4557788891 is about 67511.3982302248. The cubic root of 4557788891 is about 1658.0007977547. Note that the first 3 decimals are identical.

The spelling of 4557788891 in words is "four billion, five hundred fifty-seven million, seven hundred eighty-eight thousand, eight hundred ninety-one".