406863616818 has 8 divisors (see below), whose sum is σ = 813727233648. Its totient is φ = 135621205604.

The previous prime is 406863616801. The next prime is 406863616823. The reversal of 406863616818 is 818616368604.

It is a sphenic number, since it is the product of 3 distinct primes.

406863616818 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33905301396 + ... + 33905301407.

It is an arithmetic number, because the mean of its divisors is an integer number (101715904206).

Almost surely, 2^406863616818 is an apocalyptic number.

406863616818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

406863616818 is a wasteful number, since it uses less digits than its factorization.

406863616818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67810602808.

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 406863616818 in words is "four hundred six billion, eight hundred sixty-three million, six hundred sixteen thousand, eight hundred eighteen".