31268445643 has 2 divisors, whose sum is σ = 31268445644. Its totient is φ = 31268445642.

The previous prime is 31268445641. The next prime is 31268445667. The reversal of 31268445643 is 34654486213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31268445643 - 2¹ = 31268445641 is a prime.

Together with 31268445641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31268445593 and 31268445602.

It is not a weakly prime, because it can be changed into another prime (31268445641) 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, 15634222821 + 15634222822.

It is an arithmetic number, because the mean of its divisors is an integer number (15634222822).

Almost surely, 2^31268445643 is an apocalyptic number.

31268445643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31268445643 is an equidigital number, since it uses as much as digits as its factorization.

31268445643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 46.

The spelling of 31268445643 in words is "thirty-one billion, two hundred sixty-eight million, four hundred forty-five thousand, six hundred forty-three".