18159611201 has 2 divisors, whose sum is σ = 18159611202. Its totient is φ = 18159611200.

The previous prime is 18159611167. The next prime is 18159611207. The reversal of 18159611201 is 10211695181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14018560000 + 4141051201 = 118400^2 + 64351^2 .

It is a cyclic number.

It is not a de Polignac number, because 18159611201 - 2¹⁸ = 18159349057 is a prime.

It is not a weakly prime, because it can be changed into another prime (18159611207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9079805600 + 9079805601.

It is an arithmetic number, because the mean of its divisors is an integer number (9079805601).

Almost surely, 2^18159611201 is an apocalyptic number.

It is an amenable number.

18159611201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18159611201 is an equidigital number, since it uses as much as digits as its factorization.

18159611201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 35.

The spelling of 18159611201 in words is "eighteen billion, one hundred fifty-nine million, six hundred eleven thousand, two hundred one".