505216620 has 72 divisors (see below), whose sum is σ = 1599133536. Its totient is φ = 128865792.

The previous prime is 505216619. The next prime is 505216639. The reversal of 505216620 is 26612505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56877 + ... + 65156.

It is an arithmetic number, because the mean of its divisors is an integer number (22210188).

Almost surely, 2^505216620 is an apocalyptic number.

It is an amenable number.

505216620 is an abundant number, since it is smaller than the sum of its proper divisors (1093916916).

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

505216620 is a wasteful number, since it uses less digits than its factorization.

505216620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122071 (or 122066 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 505216620 is about 22477.0242692399. The cubic root of 505216620 is about 796.4512710130.

The spelling of 505216620 in words is "five hundred five million, two hundred sixteen thousand, six hundred twenty".