18197167601 has 2 divisors, whose sum is σ = 18197167602. Its totient is φ = 18197167600.

The previous prime is 18197167579. The next prime is 18197167633. The reversal of 18197167601 is 10676179181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17265697201 + 931470400 = 131399^2 + 30520^2 .

It is a cyclic number.

It is not a de Polignac number, because 18197167601 - 2⁶ = 18197167537 is a prime.

It is a super-2 number, since 2×18197167601² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18197167661) 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, 9098583800 + 9098583801.

It is an arithmetic number, because the mean of its divisors is an integer number (9098583801).

Almost surely, 2^18197167601 is an apocalyptic number.

It is an amenable number.

18197167601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18197167601 is an equidigital number, since it uses as much as digits as its factorization.

18197167601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 47.

The spelling of 18197167601 in words is "eighteen billion, one hundred ninety-seven million, one hundred sixty-seven thousand, six hundred one".