31944099617 has 2 divisors, whose sum is σ = 31944099618. Its totient is φ = 31944099616.

The previous prime is 31944099601. The next prime is 31944099643. The reversal of 31944099617 is 71699044913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24981699136 + 6962400481 = 158056^2 + 83441^2 .

It is a cyclic number.

It is not a de Polignac number, because 31944099617 - 2⁴ = 31944099601 is a prime.

It is not a weakly prime, because it can be changed into another prime (31944099647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15972049808 + 15972049809.

It is an arithmetic number, because the mean of its divisors is an integer number (15972049809).

Almost surely, 2^31944099617 is an apocalyptic number.

It is an amenable number.

31944099617 is a deficient number, since it is larger than the sum of its proper divisors (1).

31944099617 is an equidigital number, since it uses as much as digits as its factorization.

31944099617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 31944099617 in words is "thirty-one billion, nine hundred forty-four million, ninety-nine thousand, six hundred seventeen".