72310655721011 has 2 divisors, whose sum is σ = 72310655721012. Its totient is φ = 72310655721010.

The previous prime is 72310655720959. The next prime is 72310655721037. The reversal of 72310655721011 is 11012755601327.

It is a strong prime.

It is an emirp because it is prime and its reverse (11012755601327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72310655721011 - 2¹⁰ = 72310655719987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72310655721011.

It is not a weakly prime, because it can be changed into another prime (72310655721071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36155327860505 + 36155327860506.

It is an arithmetic number, because the mean of its divisors is an integer number (36155327860506).

Almost surely, 2^{72310655721011} is an apocalyptic number.

72310655721011 is a deficient number, since it is larger than the sum of its proper divisors (1).

72310655721011 is an equidigital number, since it uses as much as digits as its factorization.

72310655721011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 72310655721011 in words is "seventy-two trillion, three hundred ten billion, six hundred fifty-five million, seven hundred twenty-one thousand, eleven".