72647627547317 has 2 divisors, whose sum is σ = 72647627547318. Its totient is φ = 72647627547316.

The previous prime is 72647627547221. The next prime is 72647627547371. The reversal of 72647627547317 is 71374572674627.

It is a happy number.

Together with next prime (72647627547371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57523259879281 + 15124367668036 = 7584409^2 + 3889006^2 .

It is an emirp because it is prime and its reverse (71374572674627) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72647627547317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72647627547217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36323813773658 + 36323813773659.

It is an arithmetic number, because the mean of its divisors is an integer number (36323813773659).

Almost surely, 2^{72647627547317} is an apocalyptic number.

It is an amenable number.

72647627547317 is a deficient number, since it is larger than the sum of its proper divisors (1).

72647627547317 is an equidigital number, since it uses as much as digits as its factorization.

72647627547317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580849920, while the sum is 68.

The spelling of 72647627547317 in words is "seventy-two trillion, six hundred forty-seven billion, six hundred twenty-seven million, five hundred forty-seven thousand, three hundred seventeen".