427644215868 has 12 divisors (see below), whose sum is σ = 997836503720. Its totient is φ = 142548071952.

The previous prime is 427644215861. The next prime is 427644215893. The reversal of 427644215868 is 868512446724.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427644215861) 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, 17818508983 + ... + 17818509006.

Almost surely, 2^427644215868 is an apocalyptic number.

It is an amenable number.

427644215868 is an abundant number, since it is smaller than the sum of its proper divisors (570192287852).

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

427644215868 is a wasteful number, since it uses less digits than its factorization.

427644215868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35637017996 (or 35637017994 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 57.

The spelling of 427644215868 in words is "four hundred twenty-seven billion, six hundred forty-four million, two hundred fifteen thousand, eight hundred sixty-eight".