72425671729 has 2 divisors, whose sum is σ = 72425671730. Its totient is φ = 72425671728.

The previous prime is 72425671711. The next prime is 72425671817. The reversal of 72425671729 is 92717652427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66762808225 + 5662863504 = 258385^2 + 75252^2 .

It is an emirp because it is prime and its reverse (92717652427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72425671729 - 2⁷ = 72425671601 is a prime.

It is not a weakly prime, because it can be changed into another prime (72425671529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36212835864 + 36212835865.

It is an arithmetic number, because the mean of its divisors is an integer number (36212835865).

Almost surely, 2^72425671729 is an apocalyptic number.

It is an amenable number.

72425671729 is a deficient number, since it is larger than the sum of its proper divisors (1).

72425671729 is an equidigital number, since it uses as much as digits as its factorization.

72425671729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 52.

The spelling of 72425671729 in words is "seventy-two billion, four hundred twenty-five million, six hundred seventy-one thousand, seven hundred twenty-nine".