2644119197 has 8 divisors (see below), whose sum is σ = 2716324056. Its totient is φ = 2571953472.

The previous prime is 2644119143. The next prime is 2644119223. The reversal of 2644119197 is 7919114462.

It can be written as a sum of positive squares in 4 ways, for example, as 1025344441 + 1618774756 = 32021^2 + 40234^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2644119197 - 2⁸ = 2644118941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644110197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173123 + ... + 187775.

It is an arithmetic number, because the mean of its divisors is an integer number (339540507).

Almost surely, 2^2644119197 is an apocalyptic number.

It is an amenable number.

2644119197 is a deficient number, since it is larger than the sum of its proper divisors (72204859).

2644119197 is a wasteful number, since it uses less digits than its factorization.

2644119197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19567.

The product of its digits is 108864, while the sum is 44.

The square root of 2644119197 is about 51420.9995721592. Note that the first 3 decimals coincide. The cubic root of 2644119197 is about 1382.8030955625.

Adding to 2644119197 its sum of digits (44), we get a square (2644119241 = 51421²).

The spelling of 2644119197 in words is "two billion, six hundred forty-four million, one hundred nineteen thousand, one hundred ninety-seven".