85674144639 has 8 divisors (see below), whose sum is σ = 120951733680. Its totient is φ = 53756326016.

The previous prime is 85674144637. The next prime is 85674144649. The reversal of 85674144639 is 93644147658.

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

It is a cyclic number.

It is not a de Polignac number, because 85674144639 - 2¹ = 85674144637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85674144637) 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, 839942544 + ... + 839942645.

It is an arithmetic number, because the mean of its divisors is an integer number (15118966710).

Almost surely, 2^85674144639 is an apocalyptic number.

85674144639 is a deficient number, since it is larger than the sum of its proper divisors (35277589041).

85674144639 is a wasteful number, since it uses less digits than its factorization.

85674144639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679885209.

The product of its digits is 17418240, while the sum is 57.

The spelling of 85674144639 in words is "eighty-five billion, six hundred seventy-four million, one hundred forty-four thousand, six hundred thirty-nine".