85391903791 has 8 divisors (see below), whose sum is σ = 85702373568. Its totient is φ = 85081920000.

The previous prime is 85391903783. The next prime is 85391903797. The reversal of 85391903791 is 19730919358.

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 85391903791 - 2³ = 85391903783 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 (85391903797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232426 + ... + 474136.

It is an arithmetic number, because the mean of its divisors is an integer number (10712796696).

Almost surely, 2^85391903791 is an apocalyptic number.

85391903791 is a deficient number, since it is larger than the sum of its proper divisors (310469777).

85391903791 is a wasteful number, since it uses less digits than its factorization.

85391903791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242993.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 85391903791 in words is "eighty-five billion, three hundred ninety-one million, nine hundred three thousand, seven hundred ninety-one".