6441896378 has 4 divisors (see below), whose sum is σ = 9662844570. Its totient is φ = 3220948188.

The previous prime is 6441896371. The next prime is 6441896387. The reversal of 6441896378 is 8736981446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6174344929 + 267551449 = 78577^2 + 16357^2 .

It is not an unprimeable number, because it can be changed into a prime (6441896371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610474093 + ... + 1610474096.

Almost surely, 2^6441896378 is an apocalyptic number.

6441896378 is a deficient number, since it is larger than the sum of its proper divisors (3220948192).

6441896378 is a wasteful number, since it uses less digits than its factorization.

6441896378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220948191.

The product of its digits is 6967296, while the sum is 56.

The square root of 6441896378 is about 80261.4252178467. The cubic root of 6441896378 is about 1860.6780949563.

The spelling of 6441896378 in words is "six billion, four hundred forty-one million, eight hundred ninety-six thousand, three hundred seventy-eight".