31849289568 has 72 divisors (see below), whose sum is σ = 91077550200. Its totient is φ = 10557103104.

The previous prime is 31849289567. The next prime is 31849289587. The reversal of 31849289568 is 86598294813.

31849289568 is a `hidden beast` number, since 3 + 1 + 8 + 49 + 28 + 9 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31849289567) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 257353 + ... + 360456.

It is an arithmetic number, because the mean of its divisors is an integer number (1264965975).

Almost surely, 2^31849289568 is an apocalyptic number.

It is an amenable number.

31849289568 is an abundant number, since it is smaller than the sum of its proper divisors (59228260632).

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

31849289568 is a wasteful number, since it uses less digits than its factorization.

31849289568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618004 (or 617993 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 31849289568 in words is "thirty-one billion, eight hundred forty-nine million, two hundred eighty-nine thousand, five hundred sixty-eight".