31664160349 has 2 divisors, whose sum is σ = 31664160350. Its totient is φ = 31664160348.

The previous prime is 31664160343. The next prime is 31664160379. The reversal of 31664160349 is 94306146613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19849992100 + 11814168249 = 140890^2 + 108693^2 .

It is a cyclic number.

It is not a de Polignac number, because 31664160349 - 2⁵ = 31664160317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31664160343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15832080174 + 15832080175.

It is an arithmetic number, because the mean of its divisors is an integer number (15832080175).

Almost surely, 2^31664160349 is an apocalyptic number.

It is an amenable number.

31664160349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31664160349 is an equidigital number, since it uses as much as digits as its factorization.

31664160349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 31664160349 in words is "thirty-one billion, six hundred sixty-four million, one hundred sixty thousand, three hundred forty-nine".