427641168820 has 12 divisors (see below), whose sum is σ = 898046454564. Its totient is φ = 171056467520.

The previous prime is 427641168797. The next prime is 427641168853. The reversal of 427641168820 is 28861146724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123427147684 + 304214021136 = 351322^2 + 551556^2 .

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 3 ways as a sum of consecutive naturals, for example, 10691029201 + ... + 10691029240.

It is an arithmetic number, because the mean of its divisors is an integer number (74837204547).

Almost surely, 2^427641168820 is an apocalyptic number.

It is an amenable number.

427641168820 is an abundant number, since it is smaller than the sum of its proper divisors (470405285744).

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

427641168820 is a wasteful number, since it uses less digits than its factorization.

427641168820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21382058450 (or 21382058448 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 427641168820 in words is "four hundred twenty-seven billion, six hundred forty-one million, one hundred sixty-eight thousand, eight hundred twenty".