216403454753 has 4 divisors (see below), whose sum is σ = 216404795268. Its totient is φ = 216402114240.

The previous prime is 216403454717. The next prime is 216403454767. The reversal of 216403454753 is 357454304612.

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 38359964449 + 178043490304 = 195857^2 + 421952^2 .

It is a cyclic number.

It is not a de Polignac number, because 216403454753 - 2⁶ = 216403454689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216403454053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388676 + ... + 764117.

It is an arithmetic number, because the mean of its divisors is an integer number (54101198817).

Almost surely, 2^216403454753 is an apocalyptic number.

It is an amenable number.

216403454753 is a deficient number, since it is larger than the sum of its proper divisors (1340515).

216403454753 is a wasteful number, since it uses less digits than its factorization.

216403454753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340514.

The product of its (nonzero) digits is 1209600, while the sum is 44.

The spelling of 216403454753 in words is "two hundred sixteen billion, four hundred three million, four hundred fifty-four thousand, seven hundred fifty-three".