53381730505 has 4 divisors (see below), whose sum is σ = 64058076612. Its totient is φ = 42705384400.

The previous prime is 53381730443. The next prime is 53381730529. The reversal of 53381730505 is 50503718335.

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 28489726521 + 24892003984 = 168789^2 + 157772^2 .

It is not a de Polignac number, because 53381730505 - 2³³ = 44791795913 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 5338173046 + ... + 5338173055.

It is an arithmetic number, because the mean of its divisors is an integer number (16014519153).

Almost surely, 2^53381730505 is an apocalyptic number.

It is an amenable number.

53381730505 is a deficient number, since it is larger than the sum of its proper divisors (10676346107).

53381730505 is a wasteful number, since it uses less digits than its factorization.

53381730505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10676346106.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 53381730505 in words is "fifty-three billion, three hundred eighty-one million, seven hundred thirty thousand, five hundred five".