2170315645 has 16 divisors (see below), whose sum is σ = 2667329280. Its totient is φ = 1694721600.

The previous prime is 2170315639. The next prime is 2170315661. The reversal of 2170315645 is 5465130712.

2170315645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2170315645 - 2⁷ = 2170315517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2170315645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12796 + ... + 67114.

It is an arithmetic number, because the mean of its divisors is an integer number (166708080).

Almost surely, 2^2170315645 is an apocalyptic number.

It is an amenable number.

2170315645 is a deficient number, since it is larger than the sum of its proper divisors (497013635).

2170315645 is a wasteful number, since it uses less digits than its factorization.

2170315645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54516.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 2170315645 is about 46586.6466382804. The cubic root of 2170315645 is about 1294.7153600892.

The spelling of 2170315645 in words is "two billion, one hundred seventy million, three hundred fifteen thousand, six hundred forty-five".