505654323143 has 4 divisors (see below), whose sum is σ = 505792521480. Its totient is φ = 505516124808.

The previous prime is 505654323131. The next prime is 505654323169. The reversal of 505654323143 is 341323456505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505654323143 - 2¹⁰ = 505654322119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505654323143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505654322143) 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, 69093680 + ... + 69100997.

It is an arithmetic number, because the mean of its divisors is an integer number (126448130370).

Almost surely, 2^505654323143 is an apocalyptic number.

505654323143 is a deficient number, since it is larger than the sum of its proper divisors (138198337).

505654323143 is a wasteful number, since it uses less digits than its factorization.

505654323143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138198336.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 505654323143 its reverse (341323456505), we get a palindrome (846977779648).

The spelling of 505654323143 in words is "five hundred five billion, six hundred fifty-four million, three hundred twenty-three thousand, one hundred forty-three".