72569717347 has 2 divisors, whose sum is σ = 72569717348. Its totient is φ = 72569717346.

The previous prime is 72569717327. The next prime is 72569717377. The reversal of 72569717347 is 74371796527.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72569717347 - 2³¹ = 70422233699 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72569717291 and 72569717300.

It is not a weakly prime, because it can be changed into another prime (72569717327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36284858673 + 36284858674.

It is an arithmetic number, because the mean of its divisors is an integer number (36284858674).

Almost surely, 2^72569717347 is an apocalyptic number.

72569717347 is a deficient number, since it is larger than the sum of its proper divisors (1).

72569717347 is an equidigital number, since it uses as much as digits as its factorization.

72569717347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15558480, while the sum is 58.

It can be divided in two parts, 725697 and 17347, that added together give a square (743044 = 862²).

The spelling of 72569717347 in words is "seventy-two billion, five hundred sixty-nine million, seven hundred seventeen thousand, three hundred forty-seven".