505564994 has 48 divisors (see below), whose sum is σ = 861921216. Its totient is φ = 220524000.

The previous prime is 505564991. The next prime is 505565059. The reversal of 505564994 is 499465505.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505564991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4908347 + ... + 4908449.

It is an arithmetic number, because the mean of its divisors is an integer number (17956692).

Almost surely, 2^505564994 is an apocalyptic number.

505564994 is a deficient number, since it is larger than the sum of its proper divisors (356356222).

505564994 is a wasteful number, since it uses less digits than its factorization.

505564994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The square root of 505564994 is about 22484.7724916220. The cubic root of 505564994 is about 796.6342942637.

The spelling of 505564994 in words is "five hundred five million, five hundred sixty-four thousand, nine hundred ninety-four".