165160720541 has 2 divisors, whose sum is σ = 165160720542. Its totient is φ = 165160720540.

The previous prime is 165160720507. The next prime is 165160720553. The reversal of 165160720541 is 145027061561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135832788025 + 29327932516 = 368555^2 + 171254^2 .

It is an emirp because it is prime and its reverse (145027061561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165160720541 - 2¹⁴ = 165160704157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165160720495 and 165160720504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165160726541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82580360270 + 82580360271.

It is an arithmetic number, because the mean of its divisors is an integer number (82580360271).

Almost surely, 2^165160720541 is an apocalyptic number.

It is an amenable number.

165160720541 is a deficient number, since it is larger than the sum of its proper divisors (1).

165160720541 is an equidigital number, since it uses as much as digits as its factorization.

165160720541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 165160720541 in words is "one hundred sixty-five billion, one hundred sixty million, seven hundred twenty thousand, five hundred forty-one".