85639222082 has 18 divisors (see below), whose sum is σ = 135588115539. Its totient is φ = 40562222580.

The previous prime is 85639222073. The next prime is 85639222091. The reversal of 85639222082 is 28022293658.

It is an interprime number because it is at equal distance from previous prime (85639222073) and next prime (85639222091).

It can be written as a sum of positive squares in only one way, i.e., 42819611041 + 42819611041 = 206929^2 + 206929^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=206929.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7857857 + ... + 7868747.

Almost surely, 2^85639222082 is an apocalyptic number.

85639222082 is a deficient number, since it is larger than the sum of its proper divisors (49948893457).

85639222082 is an frugal number, since it uses more digits than its factorization.

85639222082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21822 (or 10912 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 85639222082 in words is "eighty-five billion, six hundred thirty-nine million, two hundred twenty-two thousand, eighty-two".