82773878940 has 120 divisors (see below), whose sum is σ = 259797409872. Its totient is φ = 22061756160.

The previous prime is 82773878921. The next prime is 82773878987. The reversal of 82773878940 is 4987837728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3440232 + ... + 3464208.

Almost surely, 2^82773878940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82773878940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129898704936).

82773878940 is an abundant number, since it is smaller than the sum of its proper divisors (177023530932).

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

82773878940 is a wasteful number, since it uses less digits than its factorization.

82773878940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26129 (or 26118 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 63.

The spelling of 82773878940 in words is "eighty-two billion, seven hundred seventy-three million, eight hundred seventy-eight thousand, nine hundred forty".