85674934109 has 4 divisors (see below), whose sum is σ = 86170165116. Its totient is φ = 85179703104.

The previous prime is 85674934097. The next prime is 85674934139. The reversal of 85674934109 is 90143947658.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50266985209 + 35407948900 = 224203^2 + 188170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85674934109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85674934139) 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, 247615244 + ... + 247615589.

It is an arithmetic number, because the mean of its divisors is an integer number (21542541279).

Almost surely, 2^85674934109 is an apocalyptic number.

It is an amenable number.

85674934109 is a deficient number, since it is larger than the sum of its proper divisors (495231007).

85674934109 is a wasteful number, since it uses less digits than its factorization.

85674934109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495231006.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 85674934109 in words is "eighty-five billion, six hundred seventy-four million, nine hundred thirty-four thousand, one hundred nine".