820215480740 has 48 divisors (see below), whose sum is σ = 1728280350720. Its totient is φ = 326977453440.

The previous prime is 820215480677. The next prime is 820215480797. The reversal of 820215480740 is 47084512028.

820215480740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10062950 + ... + 10144130.

It is an arithmetic number, because the mean of its divisors is an integer number (36005840640).

Almost surely, 2^820215480740 is an apocalyptic number.

It is an amenable number.

820215480740 is an abundant number, since it is smaller than the sum of its proper divisors (908064869980).

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

820215480740 is a wasteful number, since it uses less digits than its factorization.

820215480740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82892 (or 82890 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 41.

Adding to 820215480740 its reverse (47084512028), we get a palindrome (867299992768).

The spelling of 820215480740 in words is "eight hundred twenty billion, two hundred fifteen million, four hundred eighty thousand, seven hundred forty".