646523441147 has 4 divisors (see below), whose sum is σ = 646532304600. Its totient is φ = 646514577696.

The previous prime is 646523441131. The next prime is 646523441167. The reversal of 646523441147 is 741144325646.

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

It is a cyclic number.

It is not a de Polignac number, because 646523441147 - 2⁴ = 646523441131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646523441107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4321397 + ... + 4468502.

It is an arithmetic number, because the mean of its divisors is an integer number (161633076150).

Almost surely, 2^646523441147 is an apocalyptic number.

646523441147 is a deficient number, since it is larger than the sum of its proper divisors (8863453).

646523441147 is an equidigital number, since it uses as much as digits as its factorization.

646523441147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8863452.

The product of its digits is 1935360, while the sum is 47.

The spelling of 646523441147 in words is "six hundred forty-six billion, five hundred twenty-three million, four hundred forty-one thousand, one hundred forty-seven".