508823801820 has 72 divisors (see below), whose sum is σ = 1565170719840. Its totient is φ = 133775268480.

The previous prime is 508823801819. The next prime is 508823801869. The reversal of 508823801820 is 28108328805.

508823801820 is a `hidden beast` number, since 508 + 82 + 38 + 0 + 18 + 20 = 666.

It is a super-2 number, since 2×508823801820² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 19894255 + ... + 19919814.

It is an arithmetic number, because the mean of its divisors is an integer number (21738482220).

Almost surely, 2^508823801820 is an apocalyptic number.

It is an amenable number.

508823801820 is an abundant number, since it is smaller than the sum of its proper divisors (1056346918020).

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

508823801820 is a wasteful number, since it uses less digits than its factorization.

508823801820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39814155 (or 39814150 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 508823801820 in words is "five hundred eight billion, eight hundred twenty-three million, eight hundred one thousand, eight hundred twenty".