6444430358957 has 4 divisors (see below), whose sum is σ = 6510867785436. Its totient is φ = 6377992932480.

The previous prime is 6444430358929. The next prime is 6444430358983. The reversal of 6444430358957 is 7598530344446.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3861936362761 + 2582493996196 = 1965181^2 + 1607014^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444430358957 - 2¹⁰ = 6444430357933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6444430358957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444430358917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33218713094 + ... + 33218713287.

It is an arithmetic number, because the mean of its divisors is an integer number (1627716946359).

Almost surely, 2^{6444430358957} is an apocalyptic number.

It is an amenable number.

6444430358957 is a deficient number, since it is larger than the sum of its proper divisors (66437426479).

6444430358957 is an equidigital number, since it uses as much as digits as its factorization.

6444430358957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66437426478.

The product of its (nonzero) digits is 174182400, while the sum is 62.

The spelling of 6444430358957 in words is "six trillion, four hundred forty-four billion, four hundred thirty million, three hundred fifty-eight thousand, nine hundred fifty-seven".