505155994 has 40 divisors (see below), whose sum is σ = 899457120. Its totient is φ = 212706648.

The previous prime is 505155979. The next prime is 505156019. The reversal of 505155994 is 499551505.

It is a self number, because there is not a number n which added to its sum of digits gives 505155994.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 282427 + ... + 284209.

It is an arithmetic number, because the mean of its divisors is an integer number (22486428).

Almost surely, 2^505155994 is an apocalyptic number.

505155994 is a deficient number, since it is larger than the sum of its proper divisors (394301126).

505155994 is an equidigital number, since it uses as much as digits as its factorization.

505155994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872 (or 1851 counting only the distinct ones).

The product of its (nonzero) digits is 202500, while the sum is 43.

The square root of 505155994 is about 22475.6756071981. The cubic root of 505155994 is about 796.4194116848.

The spelling of 505155994 in words is "five hundred five million, one hundred fifty-five thousand, nine hundred ninety-four".