165442435513 has 2 divisors, whose sum is σ = 165442435514. Its totient is φ = 165442435512.

The previous prime is 165442435489. The next prime is 165442435517. The reversal of 165442435513 is 315534244561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162269591929 + 3172843584 = 402827^2 + 56328^2 .

It is a cyclic number.

It is not a de Polignac number, because 165442435513 - 2¹⁷ = 165442304441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165442435513.

It is not a weakly prime, because it can be changed into another prime (165442435517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82721217756 + 82721217757.

It is an arithmetic number, because the mean of its divisors is an integer number (82721217757).

Almost surely, 2^165442435513 is an apocalyptic number.

It is an amenable number.

165442435513 is a deficient number, since it is larger than the sum of its proper divisors (1).

165442435513 is an equidigital number, since it uses as much as digits as its factorization.

165442435513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 43.

The spelling of 165442435513 in words is "one hundred sixty-five billion, four hundred forty-two million, four hundred thirty-five thousand, five hundred thirteen".