53005505309 has 4 divisors (see below), whose sum is σ = 53025532704. Its totient is φ = 52985477916.

The previous prime is 53005505299. The next prime is 53005505339. The reversal of 53005505309 is 90350550035.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90350550035 = 5 ⋅18070110007.

It is a cyclic number.

It is not a de Polignac number, because 53005505309 - 2⁸ = 53005505053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53005505339) 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, 10009727 + ... + 10015020.

It is an arithmetic number, because the mean of its divisors is an integer number (13256383176).

Almost surely, 2^53005505309 is an apocalyptic number.

It is an amenable number.

53005505309 is a deficient number, since it is larger than the sum of its proper divisors (20027395).

53005505309 is a wasteful number, since it uses less digits than its factorization.

53005505309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20027394.

The product of its (nonzero) digits is 50625, while the sum is 35.

The spelling of 53005505309 in words is "fifty-three billion, five million, five hundred five thousand, three hundred nine".