31664160161 has 2 divisors, whose sum is σ = 31664160162. Its totient is φ = 31664160160.

The previous prime is 31664160127. The next prime is 31664160211. The reversal of 31664160161 is 16106146613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31664067136 + 93025 = 177944^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 31664160161 - 2¹⁸ = 31663898017 is a prime.

It is not a weakly prime, because it can be changed into another prime (31664160761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15832080080 + 15832080081.

It is an arithmetic number, because the mean of its divisors is an integer number (15832080081).

Almost surely, 2^31664160161 is an apocalyptic number.

It is an amenable number.

31664160161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31664160161 is an equidigital number, since it uses as much as digits as its factorization.

31664160161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 31664160161 in words is "thirty-one billion, six hundred sixty-four million, one hundred sixty thousand, one hundred sixty-one".