18288869377 has 2 divisors, whose sum is σ = 18288869378. Its totient is φ = 18288869376.

The previous prime is 18288869351. The next prime is 18288869381. The reversal of 18288869377 is 77396888281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15217936321 + 3070933056 = 123361^2 + 55416^2 .

It is an emirp because it is prime and its reverse (77396888281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18288869377 is a prime.

It is not a weakly prime, because it can be changed into another prime (18288869317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9144434688 + 9144434689.

It is an arithmetic number, because the mean of its divisors is an integer number (9144434689).

Almost surely, 2^18288869377 is an apocalyptic number.

It is an amenable number.

18288869377 is a deficient number, since it is larger than the sum of its proper divisors (1).

18288869377 is an equidigital number, since it uses as much as digits as its factorization.

18288869377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65028096, while the sum is 67.

The spelling of 18288869377 in words is "eighteen billion, two hundred eighty-eight million, eight hundred sixty-nine thousand, three hundred seventy-seven".