82509767776278 has 48 divisors (see below), whose sum is σ = 186761324445696. Its totient is φ = 26295378755760.

The previous prime is 82509767776243. The next prime is 82509767776297. The reversal of 82509767776278 is 87267776790528.

82509767776278 is a `hidden beast` number, since 8 + 250 + 97 + 6 + 7 + 7 + 7 + 6 + 278 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 82509767776197 and 82509767776206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 890718550 + ... + 890811177.

It is an arithmetic number, because the mean of its divisors is an integer number (3890860925952).

Almost surely, 2^{82509767776278} is an apocalyptic number.

82509767776278 is an abundant number, since it is smaller than the sum of its proper divisors (104251556669418).

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

82509767776278 is a wasteful number, since it uses less digits than its factorization.

82509767776278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781529849 (or 1781529846 counting only the distinct ones).

The product of its (nonzero) digits is 6970199040, while the sum is 81.

The spelling of 82509767776278 in words is "eighty-two trillion, five hundred nine billion, seven hundred sixty-seven million, seven hundred seventy-six thousand, two hundred seventy-eight".