85105749044 has 48 divisors (see below), whose sum is σ = 158360630400. Its totient is φ = 39881327616.

The previous prime is 85105749037. The next prime is 85105749059. The reversal of 85105749044 is 44094750158.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 85105749044.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17880737 + ... + 17885495.

It is an arithmetic number, because the mean of its divisors is an integer number (3299179800).

Almost surely, 2^85105749044 is an apocalyptic number.

It is an amenable number.

85105749044 is a deficient number, since it is larger than the sum of its proper divisors (73254881356).

85105749044 is a wasteful number, since it uses less digits than its factorization.

85105749044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832 (or 5830 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 85105749044 in words is "eighty-five billion, one hundred five million, seven hundred forty-nine thousand, forty-four".