31648771117 has 2 divisors, whose sum is σ = 31648771118. Its totient is φ = 31648771116.

The previous prime is 31648771103. The next prime is 31648771129. The reversal of 31648771117 is 71117784613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19435426921 + 12213344196 = 139411^2 + 110514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31648771117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31648771717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15824385558 + 15824385559.

It is an arithmetic number, because the mean of its divisors is an integer number (15824385559).

Almost surely, 2^31648771117 is an apocalyptic number.

It is an amenable number.

31648771117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31648771117 is an equidigital number, since it uses as much as digits as its factorization.

31648771117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 46.

The spelling of 31648771117 in words is "thirty-one billion, six hundred forty-eight million, seven hundred seventy-one thousand, one hundred seventeen".