204290164009 has 4 divisors (see below), whose sum is σ = 204387959380. Its totient is φ = 204192368640.

The previous prime is 204290163947. The next prime is 204290164049. The reversal of 204290164009 is 900461092402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900461092402 = 2 ⋅450230546201.

It can be written as a sum of positive squares in 2 ways, for example, as 151012291609 + 53277872400 = 388603^2 + 230820^2 .

It is a cyclic number.

It is not a de Polignac number, because 204290164009 - 2⁷ = 204290163881 is a prime.

It is a super-2 number, since 2×204290164009² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204290164049) 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, 48894552 + ... + 48898729.

It is an arithmetic number, because the mean of its divisors is an integer number (51096989845).

Almost surely, 2^204290164009 is an apocalyptic number.

It is an amenable number.

204290164009 is a deficient number, since it is larger than the sum of its proper divisors (97795371).

204290164009 is an equidigital number, since it uses as much as digits as its factorization.

204290164009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97795370.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 204290164009 in words is "two hundred four billion, two hundred ninety million, one hundred sixty-four thousand, nine".