85503211729 has 16 divisors (see below), whose sum is σ = 93466825984. Its totient is φ = 77740560000.

The previous prime is 85503211727. The next prime is 85503211733. The reversal of 85503211729 is 92711230558.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85503211729 - 2¹ = 85503211727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85503211721) 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 15 ways as a sum of consecutive naturals, for example, 652714 + ... + 772684.

It is an arithmetic number, because the mean of its divisors is an integer number (5841676624).

Almost surely, 2^85503211729 is an apocalyptic number.

It is an amenable number.

85503211729 is a deficient number, since it is larger than the sum of its proper divisors (7963614255).

85503211729 is a wasteful number, since it uses less digits than its factorization.

85503211729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120808.

The product of its (nonzero) digits is 151200, while the sum is 43.

It can be divided in two parts, 855032 and 11729, that added together give a square (866761 = 931²).

The spelling of 85503211729 in words is "eighty-five billion, five hundred three million, two hundred eleven thousand, seven hundred twenty-nine".