82161678699 has 32 divisors (see below), whose sum is σ = 122260409600. Its totient is φ = 54532077120.

The previous prime is 82161678679. The next prime is 82161678733. The reversal of 82161678699 is 99687616128.

82161678699 is a `hidden beast` number, since 8 + 2 + 1 + 616 + 7 + 8 + 6 + 9 + 9 = 666.

It is not a de Polignac number, because 82161678699 - 2¹⁵ = 82161645931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82161678629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9860367 + ... + 9868695.

It is an arithmetic number, because the mean of its divisors is an integer number (3820637800).

Almost surely, 2^82161678699 is an apocalyptic number.

82161678699 is a deficient number, since it is larger than the sum of its proper divisors (40098730901).

82161678699 is a wasteful number, since it uses less digits than its factorization.

82161678699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912 (or 9906 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 82161678699 in words is "eighty-two billion, one hundred sixty-one million, six hundred seventy-eight thousand, six hundred ninety-nine".