31865886853 has 2 divisors, whose sum is σ = 31865886854. Its totient is φ = 31865886852.

The previous prime is 31865886799. The next prime is 31865886859. The reversal of 31865886853 is 35868856813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31462600129 + 403286724 = 177377^2 + 20082^2 .

It is a cyclic number.

It is not a de Polignac number, because 31865886853 - 2¹⁷ = 31865755781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31865886791 and 31865886800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31865886859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15932943426 + 15932943427.

It is an arithmetic number, because the mean of its divisors is an integer number (15932943427).

Almost surely, 2^31865886853 is an apocalyptic number.

It is an amenable number.

31865886853 is a deficient number, since it is larger than the sum of its proper divisors (1).

31865886853 is an equidigital number, since it uses as much as digits as its factorization.

31865886853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33177600, while the sum is 61.

The spelling of 31865886853 in words is "thirty-one billion, eight hundred sixty-five million, eight hundred eighty-six thousand, eight hundred fifty-three".