505404563351 has 4 divisors (see below), whose sum is σ = 511083266400. Its totient is φ = 499725860304.

The previous prime is 505404563303. The next prime is 505404563369. The reversal of 505404563351 is 153365404505.

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 505404563351 - 2³⁸ = 230526656407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505404563299 and 505404563308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505404566351) 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, 2839351391 + ... + 2839351568.

It is an arithmetic number, because the mean of its divisors is an integer number (127770816600).

Almost surely, 2^505404563351 is an apocalyptic number.

505404563351 is a deficient number, since it is larger than the sum of its proper divisors (5678703049).

505404563351 is an equidigital number, since it uses as much as digits as its factorization.

505404563351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5678703048.

The product of its (nonzero) digits is 540000, while the sum is 41.

Adding to 505404563351 its reverse (153365404505), we get a palindrome (658769967856).

The spelling of 505404563351 in words is "five hundred five billion, four hundred four million, five hundred sixty-three thousand, three hundred fifty-one".