1618567748209 has 2 divisors, whose sum is σ = 1618567748210. Its totient is φ = 1618567748208.

The previous prime is 1618567748177. The next prime is 1618567748251. The reversal of 1618567748209 is 9028477658161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156276541809 + 462291206400 = 1075303^2 + 679920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1618567748209 - 2⁵ = 1618567748177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1618567748269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809283874104 + 809283874105.

It is an arithmetic number, because the mean of its divisors is an integer number (809283874105).

Almost surely, 2^{1618567748209} is an apocalyptic number.

It is an amenable number.

1618567748209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618567748209 is an equidigital number, since it uses as much as digits as its factorization.

1618567748209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40642560, while the sum is 64.

The spelling of 1618567748209 in words is "one trillion, six hundred eighteen billion, five hundred sixty-seven million, seven hundred forty-eight thousand, two hundred nine".