53820209809 has 8 divisors (see below), whose sum is σ = 54972852480. Its totient is φ = 52667881056.

The previous prime is 53820209801. The next prime is 53820209819. The reversal of 53820209809 is 90890202835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53820209809 - 2³ = 53820209801 is a prime.

It is a super-2 number, since 2×53820209809² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53820209801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286012 + ... + 435250.

It is an arithmetic number, because the mean of its divisors is an integer number (6871606560).

Almost surely, 2^53820209809 is an apocalyptic number.

It is an amenable number.

53820209809 is a deficient number, since it is larger than the sum of its proper divisors (1152642671).

53820209809 is a wasteful number, since it uses less digits than its factorization.

53820209809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156959.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 53820209809 in words is "fifty-three billion, eight hundred twenty million, two hundred nine thousand, eight hundred nine".