31782423268 has 6 divisors (see below), whose sum is σ = 55619240726. Its totient is φ = 15891211632.

The previous prime is 31782423209. The next prime is 31782423311. The reversal of 31782423268 is 86232428713.

It can be written as a sum of positive squares in only one way, i.e., 29807331904 + 1975091364 = 172648^2 + 44442^2 .

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, 3972802905 + ... + 3972802912.

Almost surely, 2^31782423268 is an apocalyptic number.

It is an amenable number.

31782423268 is a deficient number, since it is larger than the sum of its proper divisors (23836817458).

31782423268 is a wasteful number, since it uses less digits than its factorization.

31782423268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7945605821 (or 7945605819 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

Subtracting 31782423268 from its reverse (86232428713), we obtain a palindrome (54450005445).

The spelling of 31782423268 in words is "thirty-one billion, seven hundred eighty-two million, four hundred twenty-three thousand, two hundred sixty-eight".