8145605844 has 36 divisors (see below), whose sum is σ = 20939274720. Its totient is φ = 2669180880.

The previous prime is 8145605827. The next prime is 8145605851. The reversal of 8145605844 is 4485065418.

It is a happy number.

8145605844 is a `hidden beast` number, since 8 + 1 + 4 + 5 + 60 + 584 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8145605844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1915392 + ... + 1919639.

It is an arithmetic number, because the mean of its divisors is an integer number (581646520).

Almost surely, 2^8145605844 is an apocalyptic number.

It is an amenable number.

8145605844 is an abundant number, since it is smaller than the sum of its proper divisors (12793668876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8145605844 is a wasteful number, since it uses less digits than its factorization.

8145605844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835100 (or 3835095 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The square root of 8145605844 is about 90253.0101658665. The cubic root of 8145605844 is about 2012.0609409796.

The spelling of 8145605844 in words is "eight billion, one hundred forty-five million, six hundred five thousand, eight hundred forty-four".