72069878317 has 2 divisors, whose sum is σ = 72069878318. Its totient is φ = 72069878316.

The previous prime is 72069878281. The next prime is 72069878381. The reversal of 72069878317 is 71387896027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67950934276 + 4118944041 = 260674^2 + 64179^2 .

It is a cyclic number.

It is not a de Polignac number, because 72069878317 - 2⁷ = 72069878189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72069870317) 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, 36034939158 + 36034939159.

It is an arithmetic number, because the mean of its divisors is an integer number (36034939159).

Almost surely, 2^72069878317 is an apocalyptic number.

It is an amenable number.

72069878317 is a deficient number, since it is larger than the sum of its proper divisors (1).

72069878317 is an equidigital number, since it uses as much as digits as its factorization.

72069878317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 72069878317 in words is "seventy-two billion, sixty-nine million, eight hundred seventy-eight thousand, three hundred seventeen".