201564429089 has 2 divisors, whose sum is σ = 201564429090. Its totient is φ = 201564429088.

The previous prime is 201564429071. The next prime is 201564429137. The reversal of 201564429089 is 980924465102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200696832064 + 867597025 = 447992^2 + 29455^2 .

It is a cyclic number.

It is not a de Polignac number, because 201564429089 - 2⁸ = 201564428833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201564429019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100782214544 + 100782214545.

It is an arithmetic number, because the mean of its divisors is an integer number (100782214545).

Almost surely, 2^201564429089 is an apocalyptic number.

It is an amenable number.

201564429089 is a deficient number, since it is larger than the sum of its proper divisors (1).

201564429089 is an equidigital number, since it uses as much as digits as its factorization.

201564429089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 201564429089 in words is "two hundred one billion, five hundred sixty-four million, four hundred twenty-nine thousand, eighty-nine".