18228419413777 has 2 divisors, whose sum is σ = 18228419413778. Its totient is φ = 18228419413776.

The previous prime is 18228419413751. The next prime is 18228419413783. The reversal of 18228419413777 is 77731491482281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16702228490896 + 1526190922881 = 4086836^2 + 1235391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18228419413777 is a prime.

It is not a weakly prime, because it can be changed into another prime (18228419413277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114209706888 + 9114209706889.

It is an arithmetic number, because the mean of its divisors is an integer number (9114209706889).

Almost surely, 2^{18228419413777} is an apocalyptic number.

It is an amenable number.

18228419413777 is a deficient number, since it is larger than the sum of its proper divisors (1).

18228419413777 is an equidigital number, since it uses as much as digits as its factorization.

18228419413777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 64.

The spelling of 18228419413777 in words is "eighteen trillion, two hundred twenty-eight billion, four hundred nineteen million, four hundred thirteen thousand, seven hundred seventy-seven".