31685085683827 has 2 divisors, whose sum is σ = 31685085683828. Its totient is φ = 31685085683826.

The previous prime is 31685085683789. The next prime is 31685085683887. The reversal of 31685085683827 is 72838658058613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31685085683827 - 2³⁹ = 31135329869939 is a prime.

It is not a weakly prime, because it can be changed into another prime (31685085683887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15842542841913 + 15842542841914.

It is an arithmetic number, because the mean of its divisors is an integer number (15842542841914).

Almost surely, 2^{31685085683827} is an apocalyptic number.

31685085683827 is a deficient number, since it is larger than the sum of its proper divisors (1).

31685085683827 is an equidigital number, since it uses as much as digits as its factorization.

31685085683827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 464486400, while the sum is 70.

The spelling of 31685085683827 in words is "thirty-one trillion, six hundred eighty-five billion, eighty-five million, six hundred eighty-three thousand, eight hundred twenty-seven".