31381735748 has 18 divisors (see below), whose sum is σ = 60364455438. Its totient is φ = 14264425120.

The previous prime is 31381735729. The next prime is 31381735807. The reversal of 31381735748 is 84753718313.

It can be written as a sum of positive squares in only one way, i.e., 28987786564 + 2393949184 = 170258^2 + 48928^2 .

It is a super-2 number, since 2×31381735748² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31381735696 and 31381735705.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 32418665 + ... + 32419632.

Almost surely, 2^31381735748 is an apocalyptic number.

It is an amenable number.

31381735748 is a deficient number, since it is larger than the sum of its proper divisors (28982719690).

31381735748 is a wasteful number, since it uses less digits than its factorization.

31381735748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64838323 (or 64838310 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The spelling of 31381735748 in words is "thirty-one billion, three hundred eighty-one million, seven hundred thirty-five thousand, seven hundred forty-eight".