85105249439 has 8 divisors (see below), whose sum is σ = 97264908960. Its totient is φ = 72946031616.

The previous prime is 85105249423. The next prime is 85105249457. The reversal of 85105249439 is 93494250158.

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 85105249439 - 2⁴ = 85105249423 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 (85105249469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673427 + ... + 789755.

It is an arithmetic number, because the mean of its divisors is an integer number (12158113620).

Almost surely, 2^85105249439 is an apocalyptic number.

85105249439 is a deficient number, since it is larger than the sum of its proper divisors (12159659521).

85105249439 is a wasteful number, since it uses less digits than its factorization.

85105249439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220849.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 85105249439 in words is "eighty-five billion, one hundred five million, two hundred forty-nine thousand, four hundred thirty-nine".