31678623572 has 6 divisors (see below), whose sum is σ = 55437591258. Its totient is φ = 15839311784.

The previous prime is 31678623569. The next prime is 31678623589. The reversal of 31678623572 is 27532687613.

It can be written as a sum of positive squares in only one way, i.e., 26894688016 + 4783935556 = 163996^2 + 69166^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31678623572.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3959827943 + ... + 3959827950.

It is an arithmetic number, because the mean of its divisors is an integer number (9239598543).

Almost surely, 2^31678623572 is an apocalyptic number.

It is an amenable number.

31678623572 is a deficient number, since it is larger than the sum of its proper divisors (23758967686).

31678623572 is a wasteful number, since it uses less digits than its factorization.

31678623572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919655897 (or 7919655895 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 50.

The spelling of 31678623572 in words is "thirty-one billion, six hundred seventy-eight million, six hundred twenty-three thousand, five hundred seventy-two".