82195811918 has 16 divisors (see below), whose sum is σ = 139140246960. Its totient is φ = 36073396800.

The previous prime is 82195811879. The next prime is 82195811959. The reversal of 82195811918 is 81911859128.

It is a self number, because there is not a number n which added to its sum of digits gives 82195811918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64416143 + ... + 64417418.

It is an arithmetic number, because the mean of its divisors is an integer number (8696265435).

Almost surely, 2^82195811918 is an apocalyptic number.

82195811918 is a deficient number, since it is larger than the sum of its proper divisors (56944435042).

82195811918 is a wasteful number, since it uses less digits than its factorization.

82195811918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128833603.

The product of its digits is 414720, while the sum is 53.

The spelling of 82195811918 in words is "eighty-two billion, one hundred ninety-five million, eight hundred eleven thousand, nine hundred eighteen".