53005257805 has 4 divisors (see below), whose sum is σ = 63606309372. Its totient is φ = 42404206240.

The previous prime is 53005257803. The next prime is 53005257857. The reversal of 53005257805 is 50875250035.

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 23502729636 + 29502528169 = 153306^2 + 171763^2 .

It is not a de Polignac number, because 53005257805 - 2¹ = 53005257803 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 (53005257803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300525776 + ... + 5300525785.

It is an arithmetic number, because the mean of its divisors is an integer number (15901577343).

Almost surely, 2^53005257805 is an apocalyptic number.

It is an amenable number.

53005257805 is a deficient number, since it is larger than the sum of its proper divisors (10601051567).

53005257805 is a wasteful number, since it uses less digits than its factorization.

53005257805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601051566.

The product of its (nonzero) digits is 210000, while the sum is 40.

The spelling of 53005257805 in words is "fifty-three billion, five million, two hundred fifty-seven thousand, eight hundred five".