6441256143346 has 4 divisors (see below), whose sum is σ = 9661884215022. Its totient is φ = 3220628071672.

The previous prime is 6441256143341. The next prime is 6441256143353. The reversal of 6441256143346 is 6433416521446.

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., 6098978491321 + 342277652025 = 2469611^2 + 585045^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6441256143346.

It is not an unprimeable number, because it can be changed into a prime (6441256143341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610314035835 + ... + 1610314035838.

Almost surely, 2^{6441256143346} is an apocalyptic number.

6441256143346 is a deficient number, since it is larger than the sum of its proper divisors (3220628071676).

6441256143346 is a wasteful number, since it uses less digits than its factorization.

6441256143346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220628071675.

The product of its digits is 4976640, while the sum is 49.

The spelling of 6441256143346 in words is "six trillion, four hundred forty-one billion, two hundred fifty-six million, one hundred forty-three thousand, three hundred forty-six".