2145616605 has 24 divisors (see below), whose sum is σ = 4057166880. Its totient is φ = 1040298720.

The previous prime is 2145616573. The next prime is 2145616619. The reversal of 2145616605 is 5066165412.

2145616605 is a `hidden beast` number, since 2 + 1 + 45 + 6 + 1 + 6 + 605 = 666.

It is not a de Polignac number, because 2145616605 - 2⁵ = 2145616573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145616605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2166795 + ... + 2167784.

It is an arithmetic number, because the mean of its divisors is an integer number (169048620).

Almost surely, 2^2145616605 is an apocalyptic number.

It is an amenable number.

2145616605 is a deficient number, since it is larger than the sum of its proper divisors (1911550275).

2145616605 is a wasteful number, since it uses less digits than its factorization.

2145616605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334601 (or 4334598 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 2145616605 is about 46320.8009969603. The cubic root of 2145616605 is about 1289.7851544130.

The spelling of 2145616605 in words is "two billion, one hundred forty-five million, six hundred sixteen thousand, six hundred five".