31566232623697 has 2 divisors, whose sum is σ = 31566232623698. Its totient is φ = 31566232623696.

The previous prime is 31566232623641. The next prime is 31566232623721. The reversal of 31566232623697 is 79632623266513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16494515086336 + 15071717537361 = 4061344^2 + 3882231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31566232623697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31566232623637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15783116311848 + 15783116311849.

It is an arithmetic number, because the mean of its divisors is an integer number (15783116311849).

Almost surely, 2^{31566232623697} is an apocalyptic number.

It is an amenable number.

31566232623697 is a deficient number, since it is larger than the sum of its proper divisors (1).

31566232623697 is an equidigital number, since it uses as much as digits as its factorization.

31566232623697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88179840, while the sum is 61.

The spelling of 31566232623697 in words is "thirty-one trillion, five hundred sixty-six billion, two hundred thirty-two million, six hundred twenty-three thousand, six hundred ninety-seven".