31641813671287 has 2 divisors, whose sum is σ = 31641813671288. Its totient is φ = 31641813671286.

The previous prime is 31641813671239. The next prime is 31641813671309. The reversal of 31641813671287 is 78217631814613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31641813671287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31641813671887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15820906835643 + 15820906835644.

It is an arithmetic number, because the mean of its divisors is an integer number (15820906835644).

Almost surely, 2^{31641813671287} is an apocalyptic number.

31641813671287 is a deficient number, since it is larger than the sum of its proper divisors (1).

31641813671287 is an equidigital number, since it uses as much as digits as its factorization.

31641813671287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 58.

The spelling of 31641813671287 in words is "thirty-one trillion, six hundred forty-one billion, eight hundred thirteen million, six hundred seventy-one thousand, two hundred eighty-seven".