505400340261 has 8 divisors (see below), whose sum is σ = 673920605664. Its totient is φ = 336906817520.

The previous prime is 505400340239. The next prime is 505400340331. The reversal of 505400340261 is 162043004505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505400340261 - 2⁹ = 505400339749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505400340761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6641526 + ... + 6717191.

It is an arithmetic number, because the mean of its divisors is an integer number (84240075708).

Almost surely, 2^505400340261 is an apocalyptic number.

It is an amenable number.

505400340261 is a deficient number, since it is larger than the sum of its proper divisors (168520265403).

505400340261 is a wasteful number, since it uses less digits than its factorization.

505400340261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13371331.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 505400340261 its reverse (162043004505), we get a palindrome (667443344766).

The spelling of 505400340261 in words is "five hundred five billion, four hundred million, three hundred forty thousand, two hundred sixty-one".