427189996818 has 192 divisors, whose sum is σ = 1068708006912. Its totient is φ = 127004163840.

The previous prime is 427189996679. The next prime is 427189996837. The reversal of 427189996818 is 818699981724.

427189996818 is a `hidden beast` number, since 427 + 18 + 99 + 96 + 8 + 18 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 167065596 + ... + 167068152.

It is an arithmetic number, because the mean of its divisors is an integer number (5566187536).

Almost surely, 2^427189996818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427189996818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534354003456).

427189996818 is an abundant number, since it is smaller than the sum of its proper divisors (641518010094).

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

427189996818 is a wasteful number, since it uses less digits than its factorization.

427189996818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471 (or 3459 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 72.

The spelling of 427189996818 in words is "four hundred twenty-seven billion, one hundred eighty-nine million, nine hundred ninety-six thousand, eight hundred eighteen".