8445145685 has 4 divisors (see below), whose sum is σ = 10134174828. Its totient is φ = 6756116544.

The previous prime is 8445145679. The next prime is 8445145693. The reversal of 8445145685 is 5865415448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1946044996 + 6499100689 = 44114^2 + 80617^2 .

It is a cyclic number.

It is not a de Polignac number, because 8445145685 - 2¹² = 8445141589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844514564 + ... + 844514573.

It is an arithmetic number, because the mean of its divisors is an integer number (2533543707).

Almost surely, 2^8445145685 is an apocalyptic number.

It is an amenable number.

8445145685 is a deficient number, since it is larger than the sum of its proper divisors (1689029143).

8445145685 is a wasteful number, since it uses less digits than its factorization.

8445145685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689029142.

The product of its digits is 3072000, while the sum is 50.

The square root of 8445145685 is about 91897.4737683251. The cubic root of 8445145685 is about 2036.4279477515.

The spelling of 8445145685 in words is "eight billion, four hundred forty-five million, one hundred forty-five thousand, six hundred eighty-five".