52581643117 has 4 divisors (see below), whose sum is σ = 52582144896. Its totient is φ = 52581141340.

The previous prime is 52581643111. The next prime is 52581643129. The reversal of 52581643117 is 71134618525.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 52581643117 - 2³ = 52581643109 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 (52581643111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27259 + ... + 325432.

It is an arithmetic number, because the mean of its divisors is an integer number (13145536224).

Almost surely, 2^52581643117 is an apocalyptic number.

It is an amenable number.

52581643117 is a deficient number, since it is larger than the sum of its proper divisors (501779).

52581643117 is a wasteful number, since it uses less digits than its factorization.

52581643117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501778.

The product of its digits is 201600, while the sum is 43.

The spelling of 52581643117 in words is "fifty-two billion, five hundred eighty-one million, six hundred forty-three thousand, one hundred seventeen".