82782785280 has 144 divisors (see below), whose sum is σ = 284725193760. Its totient is φ = 20377288704.

The previous prime is 82782785269. The next prime is 82782785297. The reversal of 82782785280 is 8258728728.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 82782785280.

It is a congruent number.

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, 779235 + ... + 879074.

It is an arithmetic number, because the mean of its divisors is an integer number (1977258290).

Almost surely, 2^82782785280 is an apocalyptic number.

82782785280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82782785280 is an abundant number, since it is smaller than the sum of its proper divisors (201942408480).

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

82782785280 is a wasteful number, since it uses less digits than its factorization.

82782785280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658346 (or 1658332 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 57.

The spelling of 82782785280 in words is "eighty-two billion, seven hundred eighty-two million, seven hundred eighty-five thousand, two hundred eighty".