82691319867 has 32 divisors (see below), whose sum is σ = 124560737280. Its totient is φ = 48440192640.

The previous prime is 82691319863. The next prime is 82691319961. The reversal of 82691319867 is 76891319628.

It is not a de Polignac number, because 82691319867 - 2² = 82691319863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82691319867.

It is not an unprimeable number, because it can be changed into a prime (82691319863) 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, 434583 + ... + 595184.

It is an arithmetic number, because the mean of its divisors is an integer number (3892523040).

Almost surely, 2^82691319867 is an apocalyptic number.

82691319867 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

82691319867 is a deficient number, since it is larger than the sum of its proper divisors (41869417413).

82691319867 is a wasteful number, since it uses less digits than its factorization.

82691319867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029883.

The product of its digits is 7838208, while the sum is 60.

The spelling of 82691319867 in words is "eighty-two billion, six hundred ninety-one million, three hundred nineteen thousand, eight hundred sixty-seven".