31768431359 has 4 divisors (see below), whose sum is σ = 36306778704. Its totient is φ = 27230084016.

The previous prime is 31768431341. The next prime is 31768431389. The reversal of 31768431359 is 95313486713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95313486713 = 17 ⋅5606675689.

It is a cyclic number.

It is not a de Polignac number, because 31768431359 - 2¹² = 31768427263 is a prime.

It is a super-2 number, since 2×31768431359² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31768431389) 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 in 3 ways as a sum of consecutive naturals, for example, 2269173662 + ... + 2269173675.

It is an arithmetic number, because the mean of its divisors is an integer number (9076694676).

Almost surely, 2^31768431359 is an apocalyptic number.

31768431359 is a deficient number, since it is larger than the sum of its proper divisors (4538347345).

31768431359 is an equidigital number, since it uses as much as digits as its factorization.

31768431359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538347344.

The product of its digits is 1632960, while the sum is 50.

The spelling of 31768431359 in words is "thirty-one billion, seven hundred sixty-eight million, four hundred thirty-one thousand, three hundred fifty-nine".