505615164 has 24 divisors (see below), whose sum is σ = 1231063680. Its totient is φ = 161210544.

The previous prime is 505615129. The next prime is 505615169. The reversal of 505615164 is 461516505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505615169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915694 + ... + 916245.

It is an arithmetic number, because the mean of its divisors is an integer number (51294320).

Almost surely, 2^505615164 is an apocalyptic number.

It is an amenable number.

505615164 is an abundant number, since it is smaller than the sum of its proper divisors (725448516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505615164 is a wasteful number, since it uses less digits than its factorization.

505615164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831969 (or 1831967 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 505615164 is about 22485.8881078778. Note that the first 3 decimals coincide. The cubic root of 505615164 is about 796.6606448623.

The spelling of 505615164 in words is "five hundred five million, six hundred fifteen thousand, one hundred sixty-four".