72948918817 has 2 divisors, whose sum is σ = 72948918818. Its totient is φ = 72948918816.

The previous prime is 72948918751. The next prime is 72948918821. The reversal of 72948918817 is 71881984927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37400078881 + 35548839936 = 193391^2 + 188544^2 .

It is a cyclic number.

It is not a de Polignac number, because 72948918817 - 2¹¹ = 72948916769 is a prime.

It is not a weakly prime, because it can be changed into another prime (72948918017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36474459408 + 36474459409.

It is an arithmetic number, because the mean of its divisors is an integer number (36474459409).

Almost surely, 2^72948918817 is an apocalyptic number.

It is an amenable number.

72948918817 is a deficient number, since it is larger than the sum of its proper divisors (1).

72948918817 is an equidigital number, since it uses as much as digits as its factorization.

72948918817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 64.

The spelling of 72948918817 in words is "seventy-two billion, nine hundred forty-eight million, nine hundred eighteen thousand, eight hundred seventeen".