85553986645 has 8 divisors (see below), whose sum is σ = 102688373304. Its totient is φ = 68427463104.

The previous prime is 85553986603. The next prime is 85553986649. The reversal of 85553986645 is 54668935558.

It can be written as a sum of positive squares in 4 ways, for example, as 13722482449 + 71831504196 = 117143^2 + 268014^2 .

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 85553986645 - 2¹¹ = 85553984597 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 (85553986649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941814 + ... + 1985383.

It is an arithmetic number, because the mean of its divisors is an integer number (12836046663).

Almost surely, 2^85553986645 is an apocalyptic number.

It is an amenable number.

85553986645 is a deficient number, since it is larger than the sum of its proper divisors (17134386659).

85553986645 is a wasteful number, since it uses less digits than its factorization.

85553986645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931559.

The product of its digits is 155520000, while the sum is 64.

The spelling of 85553986645 in words is "eighty-five billion, five hundred fifty-three million, nine hundred eighty-six thousand, six hundred forty-five".