72818874695173 has 2 divisors, whose sum is σ = 72818874695174. Its totient is φ = 72818874695172.

The previous prime is 72818874695141. The next prime is 72818874695257. The reversal of 72818874695173 is 37159647881827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71991542557089 + 827332138084 = 8484783^2 + 909578^2 .

It is a cyclic number.

It is not a de Polignac number, because 72818874695173 - 2⁵ = 72818874695141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72818874695173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72818874695123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36409437347586 + 36409437347587.

It is an arithmetic number, because the mean of its divisors is an integer number (36409437347587).

Almost surely, 2^{72818874695173} is an apocalyptic number.

It is an amenable number.

72818874695173 is a deficient number, since it is larger than the sum of its proper divisors (1).

72818874695173 is an equidigital number, since it uses as much as digits as its factorization.

72818874695173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1137991680, while the sum is 76.

The spelling of 72818874695173 in words is "seventy-two trillion, eight hundred eighteen billion, eight hundred seventy-four million, six hundred ninety-five thousand, one hundred seventy-three".