161006136601 has 2 divisors, whose sum is σ = 161006136602. Its totient is φ = 161006136600.

The previous prime is 161006136589. The next prime is 161006136647. The reversal of 161006136601 is 106631600161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138250112400 + 22756024201 = 371820^2 + 150851^2 .

It is a cyclic number.

It is not a de Polignac number, because 161006136601 - 2⁵ = 161006136569 is a prime.

It is not a weakly prime, because it can be changed into another prime (161006136661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80503068300 + 80503068301.

It is an arithmetic number, because the mean of its divisors is an integer number (80503068301).

Almost surely, 2^161006136601 is an apocalyptic number.

It is an amenable number.

161006136601 is a deficient number, since it is larger than the sum of its proper divisors (1).

161006136601 is an equidigital number, since it uses as much as digits as its factorization.

161006136601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

Adding to 161006136601 its reverse (106631600161), we get a palindrome (267637736762).

The spelling of 161006136601 in words is "one hundred sixty-one billion, six million, one hundred thirty-six thousand, six hundred one".