31543071791 has 12 divisors (see below), whose sum is σ = 40028685480. Its totient is φ = 24579016560.

The previous prime is 31543071773. The next prime is 31543071803. The reversal of 31543071791 is 19717034513.

It is a de Polignac number, because none of the positive numbers 2^k-31543071791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31543071751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29260196 + ... + 29261273.

It is an arithmetic number, because the mean of its divisors is an integer number (3335723790).

Almost surely, 2^31543071791 is an apocalyptic number.

31543071791 is a deficient number, since it is larger than the sum of its proper divisors (8485613689).

31543071791 is a wasteful number, since it uses less digits than its factorization.

31543071791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58521494 (or 58521487 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The spelling of 31543071791 in words is "thirty-one billion, five hundred forty-three million, seventy-one thousand, seven hundred ninety-one".