31816297344 has 128 divisors (see below), whose sum is σ = 92295866880. Its totient is φ = 9651640320.

The previous prime is 31816297333. The next prime is 31816297361. The reversal of 31816297344 is 44379261813.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 31816297293 and 31816297302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309549 + ... + 399315.

It is an arithmetic number, because the mean of its divisors is an integer number (721061460).

Almost surely, 2^31816297344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31816297344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46147933440).

31816297344 is an abundant number, since it is smaller than the sum of its proper divisors (60479569536).

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

31816297344 is a wasteful number, since it uses less digits than its factorization.

31816297344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89868 (or 89856 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The spelling of 31816297344 in words is "thirty-one billion, eight hundred sixteen million, two hundred ninety-seven thousand, three hundred forty-four".