31538345960 has 64 divisors (see below), whose sum is σ = 77515384320. Its totient is φ = 11453218560.

The previous prime is 31538345953. The next prime is 31538345963. The reversal of 31538345960 is 6954383513.

It is not an unprimeable number, because it can be changed into a prime (31538345963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285737 + ... + 380423.

It is an arithmetic number, because the mean of its divisors is an integer number (1211177880).

Almost surely, 2^31538345960 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 31538345960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38757692160).

31538345960 is an abundant number, since it is smaller than the sum of its proper divisors (45977038360).

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

31538345960 is a wasteful number, since it uses less digits than its factorization.

31538345960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95466 (or 95462 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 31538345960 in words is "thirty-one billion, five hundred thirty-eight million, three hundred forty-five thousand, nine hundred sixty".