18182545897 has 2 divisors, whose sum is σ = 18182545898. Its totient is φ = 18182545896.

The previous prime is 18182545877. The next prime is 18182545939. The reversal of 18182545897 is 79854528181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16072154176 + 2110391721 = 126776^2 + 45939^2 .

It is a cyclic number.

It is not a de Polignac number, because 18182545897 - 2¹⁹ = 18182021609 is a prime.

It is not a weakly prime, because it can be changed into another prime (18182545877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091272948 + 9091272949.

It is an arithmetic number, because the mean of its divisors is an integer number (9091272949).

Almost surely, 2^18182545897 is an apocalyptic number.

It is an amenable number.

18182545897 is a deficient number, since it is larger than the sum of its proper divisors (1).

18182545897 is an equidigital number, since it uses as much as digits as its factorization.

18182545897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6451200, while the sum is 58.

It can be divided in two parts, 181825 and 45897, that added together give a palindrome (227722).

The spelling of 18182545897 in words is "eighteen billion, one hundred eighty-two million, five hundred forty-five thousand, eight hundred ninety-seven".