423658884865 has 4 divisors (see below), whose sum is σ = 508390661844. Its totient is φ = 338927107888.

The previous prime is 423658884839. The next prime is 423658884877. The reversal of 423658884865 is 568488856324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80366013121 + 343292871744 = 283489^2 + 585912^2 .

It is a cyclic number.

It is not a de Polignac number, because 423658884865 - 2¹³ = 423658876673 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423658884865.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42365888482 + ... + 42365888491.

It is an arithmetic number, because the mean of its divisors is an integer number (127097665461).

Almost surely, 2^423658884865 is an apocalyptic number.

It is an amenable number.

423658884865 is a deficient number, since it is larger than the sum of its proper divisors (84731776979).

423658884865 is an equidigital number, since it uses as much as digits as its factorization.

423658884865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84731776978.

The product of its digits is 353894400, while the sum is 67.

The spelling of 423658884865 in words is "four hundred twenty-three billion, six hundred fifty-eight million, eight hundred eighty-four thousand, eight hundred sixty-five".