82640211867811 has 16 divisors (see below), whose sum is σ = 89065229934240. Its totient is φ = 76224922744320.

The previous prime is 82640211867761. The next prime is 82640211867821. The reversal of 82640211867811 is 11876811204628.

It is a cyclic number.

It is not a de Polignac number, because 82640211867811 - 2¹³ = 82640211859619 is a prime.

It is a super-3 number, since 3×82640211867811³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82640211867821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942444576 + ... + 942532258.

It is an arithmetic number, because the mean of its divisors is an integer number (5566576870890).

Almost surely, 2^{82640211867811} is an apocalyptic number.

82640211867811 is a deficient number, since it is larger than the sum of its proper divisors (6425018066429).

82640211867811 is a wasteful number, since it uses less digits than its factorization.

82640211867811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142326.

The product of its (nonzero) digits is 2064384, while the sum is 55.

The spelling of 82640211867811 in words is "eighty-two trillion, six hundred forty billion, two hundred eleven million, eight hundred sixty-seven thousand, eight hundred eleven".