7272161138 has 16 divisors (see below), whose sum is σ = 11903976000. Its totient is φ = 3304395600.

The previous prime is 7272161131. The next prime is 7272161147. The reversal of 7272161138 is 8311612727.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7272161131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10868 + ... + 121088.

It is an arithmetic number, because the mean of its divisors is an integer number (743998500).

Almost surely, 2^7272161138 is an apocalyptic number.

7272161138 is a deficient number, since it is larger than the sum of its proper divisors (4631814862).

7272161138 is a wasteful number, since it uses less digits than its factorization.

7272161138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113233.

The product of its digits is 28224, while the sum is 38.

The square root of 7272161138 is about 85276.9672185872. The cubic root of 7272161138 is about 1937.4083381291.

The spelling of 7272161138 in words is "seven billion, two hundred seventy-two million, one hundred sixty-one thousand, one hundred thirty-eight".