505353243454 has 4 divisors (see below), whose sum is σ = 758029865184. Its totient is φ = 252676621726.

The previous prime is 505353243433. The next prime is 505353243469. The reversal of 505353243454 is 454342353505.

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

It is a self number, because there is not a number n which added to its sum of digits gives 505353243454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126338310862 + ... + 126338310865.

It is an arithmetic number, because the mean of its divisors is an integer number (189507466296).

Almost surely, 2^505353243454 is an apocalyptic number.

505353243454 is a deficient number, since it is larger than the sum of its proper divisors (252676621730).

505353243454 is a wasteful number, since it uses less digits than its factorization.

505353243454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252676621729.

The product of its (nonzero) digits is 2160000, while the sum is 43.

Adding to 505353243454 its reverse (454342353505), we get a palindrome (959695596959).

The spelling of 505353243454 in words is "five hundred five billion, three hundred fifty-three million, two hundred forty-three thousand, four hundred fifty-four".