85844929391 has 16 divisors (see below), whose sum is σ = 95664814560. Its totient is φ = 76486166400.

The previous prime is 85844929361. The next prime is 85844929459. The reversal of 85844929391 is 19392944858.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85844929391 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 (85844929321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299716 + ... + 1364166.

It is an arithmetic number, because the mean of its divisors is an integer number (5979050910).

Almost surely, 2^85844929391 is an apocalyptic number.

85844929391 is a deficient number, since it is larger than the sum of its proper divisors (9819885169).

85844929391 is a wasteful number, since it uses less digits than its factorization.

85844929391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68026.

The product of its digits is 22394880, while the sum is 62.

The spelling of 85844929391 in words is "eighty-five billion, eight hundred forty-four million, nine hundred twenty-nine thousand, three hundred ninety-one".