478821268820 has 54 divisors (see below), whose sum is σ = 1010678319546. Its totient is φ = 190551858080.

The previous prime is 478821268789. The next prime is 478821268823. The reversal of 478821268820 is 28862128874.

It can be written as a sum of positive squares in only one way, i.e., 383057015056 + 95764253764 = 618916^2 + 309458^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478821268823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1110954005 + ... + 1110954435.

Almost surely, 2^478821268820 is an apocalyptic number.

It is an amenable number.

478821268820 is an abundant number, since it is smaller than the sum of its proper divisors (531857050726).

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

478821268820 is an frugal number, since it uses more digits than its factorization.

478821268820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 56.

The spelling of 478821268820 in words is "four hundred seventy-eight billion, eight hundred twenty-one million, two hundred sixty-eight thousand, eight hundred twenty".