427838497566 has 16 divisors (see below), whose sum is σ = 855902634384. Its totient is φ = 142575225984.

The previous prime is 427838497553. The next prime is 427838497571. The reversal of 427838497566 is 665794838724.

It is a self number, because there is not a number n which added to its sum of digits gives 427838497566.

It is a congruent number.

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, 9376981 + ... + 9422496.

It is an arithmetic number, because the mean of its divisors is an integer number (53493914649).

Almost surely, 2^427838497566 is an apocalyptic number.

427838497566 is an abundant number, since it is smaller than the sum of its proper divisors (428064136818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

427838497566 is a wasteful number, since it uses less digits than its factorization.

427838497566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803275.

The product of its digits is 487710720, while the sum is 69.

The spelling of 427838497566 in words is "four hundred twenty-seven billion, eight hundred thirty-eight million, four hundred ninety-seven thousand, five hundred sixty-six".