618718654457 has 2 divisors, whose sum is σ = 618718654458. Its totient is φ = 618718654456.

The previous prime is 618718654447. The next prime is 618718654549. The reversal of 618718654457 is 754456817816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589656587881 + 29062066576 = 767891^2 + 170476^2 .

It is a cyclic number.

It is not a de Polignac number, because 618718654457 - 2²⁰ = 618717605881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618718654457.

It is not a weakly prime, because it can be changed into another prime (618718654447) 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, 309359327228 + 309359327229.

It is an arithmetic number, because the mean of its divisors is an integer number (309359327229).

Almost surely, 2^618718654457 is an apocalyptic number.

It is an amenable number.

618718654457 is a deficient number, since it is larger than the sum of its proper divisors (1).

618718654457 is an equidigital number, since it uses as much as digits as its factorization.

618718654457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45158400, while the sum is 62.

The spelling of 618718654457 in words is "six hundred eighteen billion, seven hundred eighteen million, six hundred fifty-four thousand, four hundred fifty-seven".