201254536409 has 2 divisors, whose sum is σ = 201254536410. Its totient is φ = 201254536408.

The previous prime is 201254536381. The next prime is 201254536423. The reversal of 201254536409 is 904635452102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172557160000 + 28697376409 = 415400^2 + 169403^2 .

It is a cyclic number.

It is not a de Polignac number, because 201254536409 - 2³² = 196959569113 is a prime.

It is not a weakly prime, because it can be changed into another prime (201254536909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100627268204 + 100627268205.

It is an arithmetic number, because the mean of its divisors is an integer number (100627268205).

Almost surely, 2^201254536409 is an apocalyptic number.

It is an amenable number.

201254536409 is a deficient number, since it is larger than the sum of its proper divisors (1).

201254536409 is an equidigital number, since it uses as much as digits as its factorization.

201254536409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 201254536409 in words is "two hundred one billion, two hundred fifty-four million, five hundred thirty-six thousand, four hundred nine".