85178945 has 8 divisors (see below), whose sum is σ = 105739560. Its totient is φ = 65793280.

The previous prime is 85178927. The next prime is 85178971. The reversal of 85178945 is 54987158.

It can be written as a sum of positive squares in 4 ways, for example, as 11751184 + 73427761 = 3428^2 + 8569^2 .

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

It is not a de Polignac number, because 85178945 - 2¹⁰ = 85177921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85178945.

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, 293576 + ... + 293865.

It is an arithmetic number, because the mean of its divisors is an integer number (13217445).

Almost surely, 2^85178945 is an apocalyptic number.

It is an amenable number.

85178945 is a deficient number, since it is larger than the sum of its proper divisors (20560615).

85178945 is a wasteful number, since it uses less digits than its factorization.

85178945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587475.

The product of its digits is 403200, while the sum is 47.

The square root of 85178945 is about 9229.2440102102. The cubic root of 85178945 is about 439.9912963154.

The spelling of 85178945 in words is "eighty-five million, one hundred seventy-eight thousand, nine hundred forty-five".