31718876849 has 16 divisors (see below), whose sum is σ = 36528641280. Its totient is φ = 27238905360.

The previous prime is 31718876843. The next prime is 31718876851. The reversal of 31718876849 is 94867881713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31718876849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31718876791 and 31718876800.

It is not an unprimeable number, because it can be changed into a prime (31718876843) 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, 146159 + ... + 291204.

It is an arithmetic number, because the mean of its divisors is an integer number (2283040080).

Almost surely, 2^31718876849 is an apocalyptic number.

It is an amenable number.

31718876849 is a deficient number, since it is larger than the sum of its proper divisors (4809764431).

31718876849 is a wasteful number, since it uses less digits than its factorization.

31718876849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437740.

The product of its digits is 16257024, while the sum is 62.

The spelling of 31718876849 in words is "thirty-one billion, seven hundred eighteen million, eight hundred seventy-six thousand, eight hundred forty-nine".