2170201638 has 16 divisors (see below), whose sum is σ = 4734985536. Its totient is φ = 657636840.

The previous prime is 2170201633. The next prime is 2170201667. The reversal of 2170201638 is 8361020712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170201633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16440856 + ... + 16440987.

It is an arithmetic number, because the mean of its divisors is an integer number (295936596).

Almost surely, 2^2170201638 is an apocalyptic number.

2170201638 is an abundant number, since it is smaller than the sum of its proper divisors (2564783898).

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

2170201638 is a wasteful number, since it uses less digits than its factorization.

2170201638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32881859.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2170201638 is about 46585.4230205115. The cubic root of 2170201638 is about 1294.6926891628.

The spelling of 2170201638 in words is "two billion, one hundred seventy million, two hundred one thousand, six hundred thirty-eight".