6447145957250 has 16 divisors (see below), whose sum is σ = 12069057232440. Its totient is φ = 2578858382800.

The previous prime is 6447145957249. The next prime is 6447145957253. The reversal of 6447145957250 is 527595417446.

It can be written as a sum of positive squares in 4 ways, for example, as 1547205113689 + 4899940843561 = 1243867^2 + 2213581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6447145957250.

It is not an unprimeable number, because it can be changed into a prime (6447145957253) 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 in 7 ways as a sum of consecutive naturals, for example, 12894291665 + ... + 12894292164.

Almost surely, 2^{6447145957250} is an apocalyptic number.

6447145957250 is a deficient number, since it is larger than the sum of its proper divisors (5621911275190).

6447145957250 is a wasteful number, since it uses less digits than its factorization.

6447145957250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25788583846 (or 25788583836 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 59.

The spelling of 6447145957250 in words is "six trillion, four hundred forty-seven billion, one hundred forty-five million, nine hundred fifty-seven thousand, two hundred fifty".