85183822721 has 4 divisors (see below), whose sum is σ = 86383594944. Its totient is φ = 83984050500.

The previous prime is 85183822699. The next prime is 85183822739. The reversal of 85183822721 is 12722838158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12722838158 = 2 ⋅6361419079.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85183822721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85183822621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599886005 + ... + 599886146.

It is an arithmetic number, because the mean of its divisors is an integer number (21595898736).

Almost surely, 2^85183822721 is an apocalyptic number.

It is an amenable number.

85183822721 is a deficient number, since it is larger than the sum of its proper divisors (1199772223).

85183822721 is a wasteful number, since it uses less digits than its factorization.

85183822721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199772222.

The product of its digits is 430080, while the sum is 47.

The spelling of 85183822721 in words is "eighty-five billion, one hundred eighty-three million, eight hundred twenty-two thousand, seven hundred twenty-one".