72178579237 has 2 divisors, whose sum is σ = 72178579238. Its totient is φ = 72178579236.

The previous prime is 72178579223. The next prime is 72178579279. The reversal of 72178579237 is 73297587127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51749880196 + 20428699041 = 227486^2 + 142929^2 .

It is a cyclic number.

It is not a de Polignac number, because 72178579237 - 2¹¹ = 72178577189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72178579037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36089289618 + 36089289619.

It is an arithmetic number, because the mean of its divisors is an integer number (36089289619).

Almost surely, 2^72178579237 is an apocalyptic number.

It is an amenable number.

72178579237 is a deficient number, since it is larger than the sum of its proper divisors (1).

72178579237 is an equidigital number, since it uses as much as digits as its factorization.

72178579237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10372320, while the sum is 58.

The spelling of 72178579237 in words is "seventy-two billion, one hundred seventy-eight million, five hundred seventy-nine thousand, two hundred thirty-seven".