31537716823 has 2 divisors, whose sum is σ = 31537716824. Its totient is φ = 31537716822.

The previous prime is 31537716773. The next prime is 31537716829. The reversal of 31537716823 is 32861773513.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31537716823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31537716829) 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, 15768858411 + 15768858412.

It is an arithmetic number, because the mean of its divisors is an integer number (15768858412).

Almost surely, 2^31537716823 is an apocalyptic number.

31537716823 is a deficient number, since it is larger than the sum of its proper divisors (1).

31537716823 is an equidigital number, since it uses as much as digits as its factorization.

31537716823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 46.

The spelling of 31537716823 in words is "thirty-one billion, five hundred thirty-seven million, seven hundred sixteen thousand, eight hundred twenty-three".