161662084472611 has 2 divisors, whose sum is σ = 161662084472612. Its totient is φ = 161662084472610.

The previous prime is 161662084472569. The next prime is 161662084472639. The reversal of 161662084472611 is 116274480266161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161662084472611 - 2⁹ = 161662084472099 is a prime.

It is a super-2 number, since 2×161662084472611² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161662084472711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80831042236305 + 80831042236306.

It is an arithmetic number, because the mean of its divisors is an integer number (80831042236306).

Almost surely, 2^{161662084472611} is an apocalyptic number.

161662084472611 is a deficient number, since it is larger than the sum of its proper divisors (1).

161662084472611 is an equidigital number, since it uses as much as digits as its factorization.

161662084472611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 161662084472611 in words is "one hundred sixty-one trillion, six hundred sixty-two billion, eighty-four million, four hundred seventy-two thousand, six hundred eleven".