72134431316 has 6 divisors (see below), whose sum is σ = 126235254810. Its totient is φ = 36067215656.

The previous prime is 72134431289. The next prime is 72134431333. The reversal of 72134431316 is 61313443127.

It can be written as a sum of positive squares in only one way, i.e., 47232328900 + 24902102416 = 217330^2 + 157804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9016803911 + ... + 9016803918.

It is an arithmetic number, because the mean of its divisors is an integer number (21039209135).

Almost surely, 2^72134431316 is an apocalyptic number.

It is an amenable number.

72134431316 is a deficient number, since it is larger than the sum of its proper divisors (54100823494).

72134431316 is a wasteful number, since it uses less digits than its factorization.

72134431316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18033607833 (or 18033607831 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The spelling of 72134431316 in words is "seventy-two billion, one hundred thirty-four million, four hundred thirty-one thousand, three hundred sixteen".