163440421465436 has 6 divisors (see below), whose sum is σ = 286020737564520. Its totient is φ = 81720210732716.

The previous prime is 163440421465429. The next prime is 163440421465441. The reversal of 163440421465436 is 634564124044361.

It is a congruent 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 as a sum of consecutive naturals, namely, 20430052683176 + ... + 20430052683183.

It is an arithmetic number, because the mean of its divisors is an integer number (47670122927420).

Almost surely, 2^{163440421465436} is an apocalyptic number.

It is an amenable number.

163440421465436 is a deficient number, since it is larger than the sum of its proper divisors (122580316099084).

163440421465436 is a wasteful number, since it uses less digits than its factorization.

163440421465436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40860105366363 (or 40860105366361 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 53.

The spelling of 163440421465436 in words is "one hundred sixty-three trillion, four hundred forty billion, four hundred twenty-one million, four hundred sixty-five thousand, four hundred thirty-six".