72425671817 has 2 divisors, whose sum is σ = 72425671818. Its totient is φ = 72425671816.

The previous prime is 72425671729. The next prime is 72425671847. The reversal of 72425671817 is 71817652427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45432496201 + 26993175616 = 213149^2 + 164296^2 .

It is a cyclic number.

It is not a de Polignac number, because 72425671817 - 2¹⁴ = 72425655433 is a prime.

It is not a weakly prime, because it can be changed into another prime (72425671847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36212835908 + 36212835909.

It is an arithmetic number, because the mean of its divisors is an integer number (36212835909).

Almost surely, 2^72425671817 is an apocalyptic number.

It is an amenable number.

72425671817 is a deficient number, since it is larger than the sum of its proper divisors (1).

72425671817 is an equidigital number, since it uses as much as digits as its factorization.

72425671817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 50.

The spelling of 72425671817 in words is "seventy-two billion, four hundred twenty-five million, six hundred seventy-one thousand, eight hundred seventeen".