72134431332 has 24 divisors (see below), whose sum is σ = 168713479872. Its totient is φ = 23987695200.

The previous prime is 72134431289. The next prime is 72134431333. The reversal of 72134431332 is 23313443127.

It is a junction number, because it is equal to n+sod(n) for n = 72134431293 and 72134431302.

It is not an unprimeable number, because it can be changed into a prime (72134431333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7134144 + ... + 7144247.

It is an arithmetic number, because the mean of its divisors is an integer number (7029728328).

Almost surely, 2^72134431332 is an apocalyptic number.

It is an amenable number.

72134431332 is an abundant number, since it is smaller than the sum of its proper divisors (96579048540).

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

72134431332 is a wasteful number, since it uses less digits than its factorization.

72134431332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14278819 (or 14278817 counting only the distinct ones).

The product of its digits is 36288, while the sum is 33.

Adding to 72134431332 its reverse (23313443127), we get a palindrome (95447874459).

The spelling of 72134431332 in words is "seventy-two billion, one hundred thirty-four million, four hundred thirty-one thousand, three hundred thirty-two".