72017464073 has 2 divisors, whose sum is σ = 72017464074. Its totient is φ = 72017464072.

The previous prime is 72017464069. The next prime is 72017464091. The reversal of 72017464073 is 37046471027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70493967049 + 1523497024 = 265507^2 + 39032^2 .

It is a cyclic number.

It is not a de Polignac number, because 72017464073 - 2² = 72017464069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72017464073.

It is not a weakly prime, because it can be changed into another prime (72017463073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36008732036 + 36008732037.

It is an arithmetic number, because the mean of its divisors is an integer number (36008732037).

Almost surely, 2^72017464073 is an apocalyptic number.

It is an amenable number.

72017464073 is a deficient number, since it is larger than the sum of its proper divisors (1).

72017464073 is an equidigital number, since it uses as much as digits as its factorization.

72017464073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 72017464073 in words is "seventy-two billion, seventeen million, four hundred sixty-four thousand, seventy-three".