9131394432 has 64 divisors (see below), whose sum is σ = 24378591600. Its totient is φ = 3028322304.

The previous prime is 9131394421. The next prime is 9131394457. The reversal of 9131394432 is 2344931319.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15294 + ... + 136002.

Almost surely, 2^9131394432 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 9131394432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12189295800).

9131394432 is an abundant number, since it is smaller than the sum of its proper divisors (15247197168).

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

9131394432 is a wasteful number, since it uses less digits than its factorization.

9131394432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120923 (or 120911 counting only the distinct ones).

The product of its digits is 69984, while the sum is 39.

The square root of 9131394432 is about 95558.3299979651. The cubic root of 9131394432 is about 2090.1576029439.

It can be divided in two parts, 91313 and 94432, that added together give a triangular number (185745 = T₆₀₉).

The spelling of 9131394432 in words is "nine billion, one hundred thirty-one million, three hundred ninety-four thousand, four hundred thirty-two".