726147128138 has 16 divisors (see below), whose sum is σ = 1148062737120. Its totient is φ = 343510037136.

The previous prime is 726147128131. The next prime is 726147128177. The reversal of 726147128138 is 831821741627.

It is not an unprimeable number, because it can be changed into a prime (726147128131) 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, 12592856 + ... + 12650387.

It is an arithmetic number, because the mean of its divisors is an integer number (71753921070).

Almost surely, 2^726147128138 is an apocalyptic number.

726147128138 is a deficient number, since it is larger than the sum of its proper divisors (421915608982).

726147128138 is a wasteful number, since it uses less digits than its factorization.

726147128138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25244021.

The product of its digits is 903168, while the sum is 50.

The spelling of 726147128138 in words is "seven hundred twenty-six billion, one hundred forty-seven million, one hundred twenty-eight thousand, one hundred thirty-eight".