85891645 has 8 divisors (see below), whose sum is σ = 117794304. Its totient is φ = 58897104.

The previous prime is 85891627. The next prime is 85891661. The reversal of 85891645 is 54619858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85891645 - 2⁷ = 85891517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85891595 and 85891604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226989 + ... + 1227058.

It is an arithmetic number, because the mean of its divisors is an integer number (14724288).

Almost surely, 2^85891645 is an apocalyptic number.

It is an amenable number.

85891645 is a deficient number, since it is larger than the sum of its proper divisors (31902659).

85891645 is a wasteful number, since it uses less digits than its factorization.

85891645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454059.

The product of its digits is 345600, while the sum is 46.

The square root of 85891645 is about 9267.7745440855. The cubic root of 85891645 is about 441.2150386797.

The spelling of 85891645 in words is "eighty-five million, eight hundred ninety-one thousand, six hundred forty-five".