82704264647778 has 24 divisors (see below), whose sum is σ = 180182587628316. Its totient is φ = 27415778335200.

The previous prime is 82704264647749. The next prime is 82704264647833. The reversal of 82704264647778 is 87774646240728.

82704264647778 is a `hidden beast` number, since 8 + 2 + 7 + 0 + 4 + 26 + 464 + 77 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 71919168587289 + 10785096060489 = 8480517^2 + 3284067^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12692486713 + ... + 12692493228.

Almost surely, 2^{82704264647778} is an apocalyptic number.

82704264647778 is an abundant number, since it is smaller than the sum of its proper divisors (97478322980538).

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

82704264647778 is a wasteful number, since it uses less digits than its factorization.

82704264647778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25384980130 (or 25384980127 counting only the distinct ones).

The product of its (nonzero) digits is 1416167424, while the sum is 72.

The spelling of 82704264647778 in words is "eighty-two trillion, seven hundred four billion, two hundred sixty-four million, six hundred forty-seven thousand, seven hundred seventy-eight".