18122178601 has 2 divisors, whose sum is σ = 18122178602. Its totient is φ = 18122178600.

The previous prime is 18122178593. The next prime is 18122178623. The reversal of 18122178601 is 10687122181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17159690025 + 962488576 = 130995^2 + 31024^2 .

It is a cyclic number.

It is not a de Polignac number, because 18122178601 - 2³ = 18122178593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18122178001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9061089300 + 9061089301.

It is an arithmetic number, because the mean of its divisors is an integer number (9061089301).

Almost surely, 2^18122178601 is an apocalyptic number.

It is an amenable number.

18122178601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18122178601 is an equidigital number, since it uses as much as digits as its factorization.

18122178601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 37.

The spelling of 18122178601 in words is "eighteen billion, one hundred twenty-two million, one hundred seventy-eight thousand, six hundred one".