161208585599 has 2 divisors, whose sum is σ = 161208585600. Its totient is φ = 161208585598.

The previous prime is 161208585569. The next prime is 161208585611. The reversal of 161208585599 is 995585802161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161208585599 - 2¹⁶ = 161208520063 is a prime.

It is a super-2 number, since 2×161208585599² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161208585569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80604292799 + 80604292800.

It is an arithmetic number, because the mean of its divisors is an integer number (80604292800).

Almost surely, 2^161208585599 is an apocalyptic number.

161208585599 is a deficient number, since it is larger than the sum of its proper divisors (1).

161208585599 is an equidigital number, since it uses as much as digits as its factorization.

161208585599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 59.

The spelling of 161208585599 in words is "one hundred sixty-one billion, two hundred eight million, five hundred eighty-five thousand, five hundred ninety-nine".