645355262147 has 6 divisors (see below), whose sum is σ = 649492011828. Its totient is φ = 641244694584.

The previous prime is 645355262099. The next prime is 645355262179. The reversal of 645355262147 is 741262553546.

It is not a de Polignac number, because 645355262147 - 2⁸ = 645355261891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645355262095 and 645355262104.

It is not an unprimeable number, because it can be changed into a prime (645355262047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13066253 + ... + 13115550.

It is an arithmetic number, because the mean of its divisors is an integer number (108248668638).

Almost surely, 2^645355262147 is an apocalyptic number.

645355262147 is a deficient number, since it is larger than the sum of its proper divisors (4136749681).

645355262147 is an equidigital number, since it uses as much as digits as its factorization.

645355262147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26182117 (or 26181960 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 50.

The spelling of 645355262147 in words is "six hundred forty-five billion, three hundred fifty-five million, two hundred sixty-two thousand, one hundred forty-seven".