161605662015827 has 2 divisors, whose sum is σ = 161605662015828. Its totient is φ = 161605662015826.

The previous prime is 161605662015797. The next prime is 161605662015857. The reversal of 161605662015827 is 728510266506161.

It is a balanced prime because it is at equal distance from previous prime (161605662015797) and next prime (161605662015857).

It is a cyclic number.

It is not a de Polignac number, because 161605662015827 - 2²⁰ = 161605660967251 is a prime.

It is a super-2 number, since 2×161605662015827² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161605662015857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80802831007913 + 80802831007914.

It is an arithmetic number, because the mean of its divisors is an integer number (80802831007914).

Almost surely, 2^{161605662015827} is an apocalyptic number.

161605662015827 is a deficient number, since it is larger than the sum of its proper divisors (1).

161605662015827 is an equidigital number, since it uses as much as digits as its factorization.

161605662015827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 161605662015827 in words is "one hundred sixty-one trillion, six hundred five billion, six hundred sixty-two million, fifteen thousand, eight hundred twenty-seven".