72213426709 has 2 divisors, whose sum is σ = 72213426710. Its totient is φ = 72213426708.

The previous prime is 72213426683. The next prime is 72213426737. The reversal of 72213426709 is 90762431227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69237396900 + 2976029809 = 263130^2 + 54553^2 .

It is a cyclic number.

It is not a de Polignac number, because 72213426709 - 2³¹ = 70065943061 is a prime.

It is a super-2 number, since 2×72213426709² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72213426739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36106713354 + 36106713355.

It is an arithmetic number, because the mean of its divisors is an integer number (36106713355).

Almost surely, 2^72213426709 is an apocalyptic number.

It is an amenable number.

72213426709 is a deficient number, since it is larger than the sum of its proper divisors (1).

72213426709 is an equidigital number, since it uses as much as digits as its factorization.

72213426709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 72213426709 in words is "seventy-two billion, two hundred thirteen million, four hundred twenty-six thousand, seven hundred nine".