31145071736 has 16 divisors (see below), whose sum is σ = 59821327440. Its totient is φ = 15192717760.

The previous prime is 31145071733. The next prime is 31145071817. The reversal of 31145071736 is 63717054113.

It is a self number, because there is not a number n which added to its sum of digits gives 31145071736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145071733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47476916 + ... + 47477571.

It is an arithmetic number, because the mean of its divisors is an integer number (3738832965).

Almost surely, 2^31145071736 is an apocalyptic number.

It is an amenable number.

31145071736 is a deficient number, since it is larger than the sum of its proper divisors (28676255704).

31145071736 is a wasteful number, since it uses less digits than its factorization.

31145071736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94954534 (or 94954530 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 31145071736 in words is "thirty-one billion, one hundred forty-five million, seventy-one thousand, seven hundred thirty-six".