85683821861 has 8 divisors (see below), whose sum is σ = 93989689248. Its totient is φ = 77464026000.

The previous prime is 85683821813. The next prime is 85683821887. The reversal of 85683821861 is 16812838658.

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-85683821861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85683821797 and 85683821806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85683821801) 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, 21515795 + ... + 21519776.

It is an arithmetic number, because the mean of its divisors is an integer number (11748711156).

Almost surely, 2^85683821861 is an apocalyptic number.

It is an amenable number.

85683821861 is a deficient number, since it is larger than the sum of its proper divisors (8305867387).

85683821861 is a wasteful number, since it uses less digits than its factorization.

85683821861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43035763.

The product of its digits is 4423680, while the sum is 56.

The spelling of 85683821861 in words is "eighty-five billion, six hundred eighty-three million, eight hundred twenty-one thousand, eight hundred sixty-one".