201072171589 has 2 divisors, whose sum is σ = 201072171590. Its totient is φ = 201072171588.

The previous prime is 201072171577. The next prime is 201072171623. The reversal of 201072171589 is 985171270102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180225720900 + 20846450689 = 424530^2 + 144383^2 .

It is a cyclic number.

It is not a de Polignac number, because 201072171589 - 2¹⁵ = 201072138821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201072111589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100536085794 + 100536085795.

It is an arithmetic number, because the mean of its divisors is an integer number (100536085795).

Almost surely, 2^201072171589 is an apocalyptic number.

It is an amenable number.

201072171589 is a deficient number, since it is larger than the sum of its proper divisors (1).

201072171589 is an equidigital number, since it uses as much as digits as its factorization.

201072171589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 43.

The spelling of 201072171589 in words is "two hundred one billion, seventy-two million, one hundred seventy-one thousand, five hundred eighty-nine".