31353838672 has 20 divisors (see below), whose sum is σ = 65420990740. Its totient is φ = 14471002368.

The previous prime is 31353838669. The next prime is 31353838673. The reversal of 31353838672 is 27683835313.

It can be written as a sum of positive squares in 2 ways, for example, as 4825247296 + 26528591376 = 69464^2 + 162876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31353838673) 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 3 ways as a sum of consecutive naturals, for example, 75369597 + ... + 75370012.

It is an arithmetic number, because the mean of its divisors is an integer number (3271049537).

Almost surely, 2^31353838672 is an apocalyptic number.

It is an amenable number.

31353838672 is an abundant number, since it is smaller than the sum of its proper divisors (34067152068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31353838672 is a wasteful number, since it uses less digits than its factorization.

31353838672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150739630 (or 150739624 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The spelling of 31353838672 in words is "thirty-one billion, three hundred fifty-three million, eight hundred thirty-eight thousand, six hundred seventy-two".