31663866429071 has 2 divisors, whose sum is σ = 31663866429072. Its totient is φ = 31663866429070.

The previous prime is 31663866429061. The next prime is 31663866429101. The reversal of 31663866429071 is 17092466836613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31663866429071 - 2¹⁸ = 31663866166927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31663866428995 and 31663866429013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31663866429011) 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, 15831933214535 + 15831933214536.

It is an arithmetic number, because the mean of its divisors is an integer number (15831933214536).

Almost surely, 2^{31663866429071} is an apocalyptic number.

31663866429071 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663866429071 is an equidigital number, since it uses as much as digits as its factorization.

31663866429071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47029248, while the sum is 62.

The spelling of 31663866429071 in words is "thirty-one trillion, six hundred sixty-three billion, eight hundred sixty-six million, four hundred twenty-nine thousand, seventy-one".