83685205811 has 8 divisors (see below), whose sum is σ = 86198475264. Its totient is φ = 81197713800.

The previous prime is 83685205787. The next prime is 83685205817. The reversal of 83685205811 is 11850258638.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83685205811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83685205817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6437771 + ... + 6450756.

It is an arithmetic number, because the mean of its divisors is an integer number (10774809408).

Almost surely, 2^83685205811 is an apocalyptic number.

83685205811 is a deficient number, since it is larger than the sum of its proper divisors (2513269453).

83685205811 is a wasteful number, since it uses less digits than its factorization.

83685205811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888721.

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 83685205811 in words is "eighty-three billion, six hundred eighty-five million, two hundred five thousand, eight hundred eleven".