31368782887 has 16 divisors (see below), whose sum is σ = 35569296000. Its totient is φ = 27424449504.

The previous prime is 31368782881. The next prime is 31368782903. The reversal of 31368782887 is 78828786313.

It is a cyclic number.

It is not a de Polignac number, because 31368782887 - 2⁷ = 31368782759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31368782881) 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 in 15 ways as a sum of consecutive naturals, for example, 1037064 + ... + 1066882.

It is an arithmetic number, because the mean of its divisors is an integer number (2223081000).

Almost surely, 2^31368782887 is an apocalyptic number.

31368782887 is a deficient number, since it is larger than the sum of its proper divisors (4200513113).

31368782887 is a wasteful number, since it uses less digits than its factorization.

31368782887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34110.

The product of its digits is 21676032, while the sum is 61.

The spelling of 31368782887 in words is "thirty-one billion, three hundred sixty-eight million, seven hundred eighty-two thousand, eight hundred eighty-seven".