82791408820 has 24 divisors (see below), whose sum is σ = 173867668128. Its totient is φ = 33115476000.

The previous prime is 82791408793. The next prime is 82791408883. The reversal of 82791408820 is 2880419728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876075 + ... + 965965.

It is an arithmetic number, because the mean of its divisors is an integer number (7244486172).

Almost surely, 2^82791408820 is an apocalyptic number.

It is an amenable number.

82791408820 is an abundant number, since it is smaller than the sum of its proper divisors (91076259308).

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

82791408820 is a wasteful number, since it uses less digits than its factorization.

82791408820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135951 (or 135949 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 82791408820 in words is "eighty-two billion, seven hundred ninety-one million, four hundred eight thousand, eight hundred twenty".