72644052647189 has 2 divisors, whose sum is σ = 72644052647190. Its totient is φ = 72644052647188.

The previous prime is 72644052647171. The next prime is 72644052647219. The reversal of 72644052647189 is 98174625044627.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71806269404164 + 837783243025 = 8473858^2 + 915305^2 .

It is a cyclic number.

It is not a de Polignac number, because 72644052647189 - 2⁴⁴ = 55051866602773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72644052647119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322026323594 + 36322026323595.

It is an arithmetic number, because the mean of its divisors is an integer number (36322026323595).

Almost surely, 2^{72644052647189} is an apocalyptic number.

It is an amenable number.

72644052647189 is a deficient number, since it is larger than the sum of its proper divisors (1).

72644052647189 is an equidigital number, since it uses as much as digits as its factorization.

72644052647189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162570240, while the sum is 65.

The spelling of 72644052647189 in words is "seventy-two trillion, six hundred forty-four billion, fifty-two million, six hundred forty-seven thousand, one hundred eighty-nine".