425843220566 has 16 divisors (see below), whose sum is σ = 639745482240. Its totient is φ = 212594976360.

The previous prime is 425843220529. The next prime is 425843220637. The reversal of 425843220566 is 665022348524.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 425843220566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3421415 + ... + 3543693.

It is an arithmetic number, because the mean of its divisors is an integer number (39984092640).

Almost surely, 2^425843220566 is an apocalyptic number.

425843220566 is a deficient number, since it is larger than the sum of its proper divisors (213902261674).

425843220566 is a wasteful number, since it uses less digits than its factorization.

425843220566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124939.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 425843220566 in words is "four hundred twenty-five billion, eight hundred forty-three million, two hundred twenty thousand, five hundred sixty-six".