31606534144 has 52 divisors (see below), whose sum is σ = 64242013000. Its totient is φ = 15544074240.

The previous prime is 31606534129. The next prime is 31606534177. The reversal of 31606534144 is 44143560613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186607 + ... + 313105.

Almost surely, 2^31606534144 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 31606534144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32121006500).

31606534144 is an abundant number, since it is smaller than the sum of its proper divisors (32635478856).

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

31606534144 is an equidigital number, since it uses as much as digits as its factorization.

31606534144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126584 (or 126562 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 31606534144 in words is "thirty-one billion, six hundred six million, five hundred thirty-four thousand, one hundred forty-four".