523828018209 has 4 divisors (see below), whose sum is σ = 698437357616. Its totient is φ = 349218678804.

The previous prime is 523828018193. The next prime is 523828018211. The reversal of 523828018209 is 902810828325.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 523828018209 - 2⁴ = 523828018193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523828011209) 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, 87304669699 + ... + 87304669704.

It is an arithmetic number, because the mean of its divisors is an integer number (174609339404).

Almost surely, 2^523828018209 is an apocalyptic number.

It is an amenable number.

523828018209 is a deficient number, since it is larger than the sum of its proper divisors (174609339407).

523828018209 is a wasteful number, since it uses less digits than its factorization.

523828018209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174609339406.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 523828018209 in words is "five hundred twenty-three billion, eight hundred twenty-eight million, eighteen thousand, two hundred nine".