2192078645 has 4 divisors (see below), whose sum is σ = 2630494380. Its totient is φ = 1753662912.

The previous prime is 2192078611. The next prime is 2192078671. The reversal of 2192078645 is 5468702912.

It is a happy number.

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 1324304881 + 867773764 = 36391^2 + 29458^2 .

It is a cyclic number.

It is not a de Polignac number, because 2192078645 - 2²² = 2187884341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2192078596 and 2192078605.

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, 219207860 + ... + 219207869.

It is an arithmetic number, because the mean of its divisors is an integer number (657623595).

Almost surely, 2^2192078645 is an apocalyptic number.

It is an amenable number.

2192078645 is a deficient number, since it is larger than the sum of its proper divisors (438415735).

2192078645 is an equidigital number, since it uses as much as digits as its factorization.

2192078645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438415734.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 2192078645 is about 46819.6395223201. The cubic root of 2192078645 is about 1299.0285928506.

The spelling of 2192078645 in words is "two billion, one hundred ninety-two million, seventy-eight thousand, six hundred forty-five".