31189425072 has 160 divisors (see below), whose sum is σ = 91476645120. Its totient is φ = 9077806080.

The previous prime is 31189425061. The next prime is 31189425077. The reversal of 31189425072 is 27052498113.

It is not an unprimeable number, because it can be changed into a prime (31189425077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9803322 + ... + 9806502.

It is an arithmetic number, because the mean of its divisors is an integer number (571729032).

Almost surely, 2^31189425072 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 31189425072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45738322560).

31189425072 is an abundant number, since it is smaller than the sum of its proper divisors (60287220048).

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

31189425072 is a wasteful number, since it uses less digits than its factorization.

31189425072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051 (or 4045 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 31189425072 in words is "thirty-one billion, one hundred eighty-nine million, four hundred twenty-five thousand, seventy-two".