505407855 has 16 divisors (see below), whose sum is σ = 809293824. Its totient is φ = 269337120.

The previous prime is 505407839. The next prime is 505407857. The reversal of 505407855 is 558704505.

It is not a de Polignac number, because 505407855 - 2⁴ = 505407839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505407857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7210 + ... + 32600.

It is an arithmetic number, because the mean of its divisors is an integer number (50580864).

Almost surely, 2^505407855 is an apocalyptic number.

505407855 is a deficient number, since it is larger than the sum of its proper divisors (303885969).

505407855 is a wasteful number, since it uses less digits than its factorization.

505407855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26726.

The product of its (nonzero) digits is 140000, while the sum is 39.

The square root of 505407855 is about 22481.2778773805. The cubic root of 505407855 is about 796.5517494609.

The spelling of 505407855 in words is "five hundred five million, four hundred seven thousand, eight hundred fifty-five".