6499378442 has 8 divisors (see below), whose sum is σ = 10085242500. Its totient is φ = 3137630944.

The previous prime is 6499378441. The next prime is 6499378513. The reversal of 6499378442 is 2448739946.

It can be written as a sum of positive squares in 2 ways, for example, as 6308966041 + 190412401 = 79429^2 + 13799^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6499378441) 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, 56029067 + ... + 56029182.

Almost surely, 2^6499378442 is an apocalyptic number.

6499378442 is a deficient number, since it is larger than the sum of its proper divisors (3585864058).

6499378442 is a wasteful number, since it uses less digits than its factorization.

6499378442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112058280.

The product of its digits is 10450944, while the sum is 56.

The square root of 6499378442 is about 80618.7226517513. The cubic root of 6499378442 is about 1866.1960900465.

The spelling of 6499378442 in words is "six billion, four hundred ninety-nine million, three hundred seventy-eight thousand, four hundred forty-two".