2195378449 has 4 divisors (see below), whose sum is σ = 2394958320. Its totient is φ = 1995798580.

The previous prime is 2195378417. The next prime is 2195378501. The reversal of 2195378449 is 9448735912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2195378449 - 2⁵ = 2195378417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2195378396 and 2195378405.

It is not an unprimeable number, because it can be changed into a prime (2195379449) 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 3 ways as a sum of consecutive naturals, for example, 99789919 + ... + 99789940.

It is an arithmetic number, because the mean of its divisors is an integer number (598739580).

Almost surely, 2^2195378449 is an apocalyptic number.

It is an amenable number.

2195378449 is a deficient number, since it is larger than the sum of its proper divisors (199579871).

2195378449 is a wasteful number, since it uses less digits than its factorization.

2195378449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199579870.

The product of its digits is 2177280, while the sum is 52.

The square root of 2195378449 is about 46854.8657985486. The cubic root of 2195378449 is about 1299.6800887365.

The spelling of 2195378449 in words is "two billion, one hundred ninety-five million, three hundred seventy-eight thousand, four hundred forty-nine".