31658331012 has 144 divisors (see below), whose sum is σ = 98675700480. Its totient is φ = 7790126400.

The previous prime is 31658331007. The next prime is 31658331037. The reversal of 31658331012 is 21013385613.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5914 + ... + 251697.

It is an arithmetic number, because the mean of its divisors is an integer number (685247920).

Almost surely, 2^31658331012 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 31658331012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49337850240).

31658331012 is an abundant number, since it is smaller than the sum of its proper divisors (67017369468).

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

31658331012 is a wasteful number, since it uses less digits than its factorization.

31658331012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257662 (or 257653 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 31658331012 in words is "thirty-one billion, six hundred fifty-eight million, three hundred thirty-one thousand, twelve".