645583385546 has 16 divisors (see below), whose sum is σ = 1056490332768. Its totient is φ = 293424450000.

The previous prime is 645583385519. The next prime is 645583385563.

645583385546 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832580 + ... + 1408671.

It is an arithmetic number, because the mean of its divisors is an integer number (66030645798).

Almost surely, 2^645583385546 is an apocalyptic number.

645583385546 is a deficient number, since it is larger than the sum of its proper divisors (410906947222).

645583385546 is a wasteful number, since it uses less digits than its factorization.

645583385546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254357.

The product of its digits is 207360000, while the sum is 62.

The spelling of 645583385546 in words is "six hundred forty-five billion, five hundred eighty-three million, three hundred eighty-five thousand, five hundred forty-six".