31626430066481 has 2 divisors, whose sum is σ = 31626430066482. Its totient is φ = 31626430066480.

The previous prime is 31626430066457. The next prime is 31626430066501. The reversal of 31626430066481 is 18466003462613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30272444161600 + 1353985904881 = 5502040^2 + 1163609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31626430066481 is a prime.

It is a super-2 number, since 2×31626430066481² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31626430066981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15813215033240 + 15813215033241.

It is an arithmetic number, because the mean of its divisors is an integer number (15813215033241).

Almost surely, 2^{31626430066481} is an apocalyptic number.

It is an amenable number.

31626430066481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31626430066481 is an equidigital number, since it uses as much as digits as its factorization.

31626430066481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 50.

The spelling of 31626430066481 in words is "thirty-one trillion, six hundred twenty-six billion, four hundred thirty million, sixty-six thousand, four hundred eighty-one".