31578453368 has 96 divisors (see below), whose sum is σ = 75265718400. Its totient is φ = 12282379200.

The previous prime is 31578453367. The next prime is 31578453371. The reversal of 31578453368 is 86335487513.

It is a super-2 number, since 2×31578453368² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31578453367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2663213 + ... + 2675043.

It is an arithmetic number, because the mean of its divisors is an integer number (784017900).

Almost surely, 2^31578453368 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 31578453368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37632859200).

31578453368 is an abundant number, since it is smaller than the sum of its proper divisors (43687265032).

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

31578453368 is a wasteful number, since it uses less digits than its factorization.

31578453368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12481 (or 12470 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 53.

The spelling of 31578453368 in words is "thirty-one billion, five hundred seventy-eight million, four hundred fifty-three thousand, three hundred sixty-eight".