82178705854 has 12 divisors (see below), whose sum is σ = 143393456304. Its totient is φ = 35219445324.

The previous prime is 82178705821. The next prime is 82178705929. The reversal of 82178705854 is 45850787128.

It is a junction number, because it is equal to n+sod(n) for n = 82178705795 and 82178705804.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 419279014 + ... + 419279209.

It is an arithmetic number, because the mean of its divisors is an integer number (11949454692).

Almost surely, 2^82178705854 is an apocalyptic number.

82178705854 is a deficient number, since it is larger than the sum of its proper divisors (61214750450).

82178705854 is a wasteful number, since it uses less digits than its factorization.

82178705854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838558239 (or 838558232 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 55.

The spelling of 82178705854 in words is "eighty-two billion, one hundred seventy-eight million, seven hundred five thousand, eight hundred fifty-four".