165500716049 has 2 divisors, whose sum is σ = 165500716050. Its totient is φ = 165500716048.

The previous prime is 165500716039. The next prime is 165500716103. The reversal of 165500716049 is 940617005561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165453697600 + 47018449 = 406760^2 + 6857^2 .

It is a cyclic number.

It is not a de Polignac number, because 165500716049 - 2²⁴ = 165483938833 is a prime.

It is not a weakly prime, because it can be changed into another prime (165500716039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750358024 + 82750358025.

It is an arithmetic number, because the mean of its divisors is an integer number (82750358025).

Almost surely, 2^165500716049 is an apocalyptic number.

It is an amenable number.

165500716049 is a deficient number, since it is larger than the sum of its proper divisors (1).

165500716049 is an equidigital number, since it uses as much as digits as its factorization.

165500716049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 165500716049 in words is "one hundred sixty-five billion, five hundred million, seven hundred sixteen thousand, forty-nine".