505505455 has 32 divisors (see below), whose sum is σ = 790521984. Its totient is φ = 301142016.

The previous prime is 505505449. The next prime is 505505459. The reversal of 505505455 is 554505505.

It is not a de Polignac number, because 505505455 - 2⁵ = 505505423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505505455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505505459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24942 + ... + 40411.

It is an arithmetic number, because the mean of its divisors is an integer number (24703812).

Almost surely, 2^505505455 is an apocalyptic number.

505505455 is a deficient number, since it is larger than the sum of its proper divisors (285016529).

505505455 is a wasteful number, since it uses less digits than its factorization.

505505455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65395.

The product of its (nonzero) digits is 62500, while the sum is 34.

The square root of 505505455 is about 22483.4484677062. The cubic root of 505505455 is about 796.6030205588.

Subtracting 505505455 from its reverse (554505505), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 505505455 in words is "five hundred five million, five hundred five thousand, four hundred fifty-five".