447420178809 has 6 divisors (see below), whose sum is σ = 646273591626. Its totient is φ = 298280119200.

The previous prime is 447420178753. The next prime is 447420178813. The reversal of 447420178809 is 908871024744.

447420178809 is a `hidden beast` number, since 4 + 47 + 420 + 178 + 8 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 410528525625 + 36891653184 = 640725^2 + 192072^2 .

It is not a de Polignac number, because 447420178809 - 2¹² = 447420174713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (447420178859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24856676592 + ... + 24856676609.

It is an arithmetic number, because the mean of its divisors is an integer number (107712265271).

Almost surely, 2^447420178809 is an apocalyptic number.

It is an amenable number.

447420178809 is a deficient number, since it is larger than the sum of its proper divisors (198853412817).

447420178809 is a wasteful number, since it uses less digits than its factorization.

447420178809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49713353207 (or 49713353204 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 447420178809 in words is "four hundred forty-seven billion, four hundred twenty million, one hundred seventy-eight thousand, eight hundred nine".