505545955 has 4 divisors (see below), whose sum is σ = 606655152. Its totient is φ = 404436760.

The previous prime is 505545947. The next prime is 505545961. The reversal of 505545955 is 559545505.

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

It is not a de Polignac number, because 505545955 - 2³ = 505545947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50554591 + ... + 50554600.

It is an arithmetic number, because the mean of its divisors is an integer number (151663788).

Almost surely, 2^505545955 is an apocalyptic number.

505545955 is a deficient number, since it is larger than the sum of its proper divisors (101109197).

505545955 is a wasteful number, since it uses less digits than its factorization.

505545955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101109196.

The product of its (nonzero) digits is 562500, while the sum is 43.

The square root of 505545955 is about 22484.3491122158. The cubic root of 505545955 is about 796.6242940258.

The spelling of 505545955 in words is "five hundred five million, five hundred forty-five thousand, nine hundred fifty-five".