82778672061 has 16 divisors (see below), whose sum is σ = 124948941120. Its totient is φ = 54144539280.

The previous prime is 82778672029. The next prime is 82778672063. The reversal of 82778672061 is 16027687728.

It is a happy number.

It is not a de Polignac number, because 82778672061 - 2⁵ = 82778672029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82778671989 and 82778672007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82778672063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28921935 + ... + 28924796.

It is an arithmetic number, because the mean of its divisors is an integer number (7809308820).

Almost surely, 2^82778672061 is an apocalyptic number.

It is an amenable number.

82778672061 is a deficient number, since it is larger than the sum of its proper divisors (42170269059).

82778672061 is a wasteful number, since it uses less digits than its factorization.

82778672061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57846793 (or 57846787 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 82778672061 in words is "eighty-two billion, seven hundred seventy-eight million, six hundred seventy-two thousand, sixty-one".