82161678762 has 24 divisors (see below), whose sum is σ = 181375783524. Its totient is φ = 26870485824.

The previous prime is 82161678751. The next prime is 82161678763. The reversal of 82161678762 is 26787616128.

It can be written as a sum of positive squares in 2 ways, for example, as 66250126881 + 15911551881 = 257391^2 + 126141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82161678699 and 82161678708.

It is not an unprimeable number, because it can be changed into a prime (82161678763) by changing a digit.

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, 43060723 + ... + 43062630.

Almost surely, 2^82161678762 is an apocalyptic number.

82161678762 is an abundant number, since it is smaller than the sum of its proper divisors (99214104762).

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

82161678762 is a wasteful number, since it uses less digits than its factorization.

82161678762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86123414 (or 86123411 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 82161678762 in words is "eighty-two billion, one hundred sixty-one million, six hundred seventy-eight thousand, seven hundred sixty-two".