82106940085 has 16 divisors (see below), whose sum is σ = 105120493632. Its totient is φ = 61349766400.

The previous prime is 82106940073. The next prime is 82106940107. The reversal of 82106940085 is 58004960128.

It is a happy number.

It is not a de Polignac number, because 82106940085 - 2³⁵ = 47747201717 is a prime.

It is a super-2 number, since 2×82106940085² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3675751 + ... + 3698020.

It is an arithmetic number, because the mean of its divisors is an integer number (6570030852).

Almost surely, 2^82106940085 is an apocalyptic number.

82106940085 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

82106940085 is a deficient number, since it is larger than the sum of its proper divisors (23013553547).

82106940085 is a wasteful number, since it uses less digits than its factorization.

82106940085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373924.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 82106940085 in words is "eighty-two billion, one hundred six million, nine hundred forty thousand, eighty-five".