201834552809 has 4 divisors (see below), whose sum is σ = 203832914820. Its totient is φ = 199836190800.

The previous prime is 201834552779. The next prime is 201834552827. The reversal of 201834552809 is 908255438102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149552358400 + 52282194409 = 386720^2 + 228653^2 .

It is a cyclic number.

It is not a de Polignac number, because 201834552809 - 2¹⁶ = 201834487273 is a prime.

It is a super-3 number, since 3×201834552809³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201834552839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999180854 + ... + 999181055.

It is an arithmetic number, because the mean of its divisors is an integer number (50958228705).

Almost surely, 2^201834552809 is an apocalyptic number.

It is an amenable number.

201834552809 is a deficient number, since it is larger than the sum of its proper divisors (1998362011).

201834552809 is a wasteful number, since it uses less digits than its factorization.

201834552809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998362010.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 201834552809 in words is "two hundred one billion, eight hundred thirty-four million, five hundred fifty-two thousand, eight hundred nine".