216411263403 has 4 divisors (see below), whose sum is σ = 288548351208. Its totient is φ = 144274175600.

The previous prime is 216411263351. The next prime is 216411263417. The reversal of 216411263403 is 304362114612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216411263403 - 2⁹ = 216411262891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216411264403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36068543898 + ... + 36068543903.

It is an arithmetic number, because the mean of its divisors is an integer number (72137087802).

Almost surely, 2^216411263403 is an apocalyptic number.

216411263403 is a deficient number, since it is larger than the sum of its proper divisors (72137087805).

216411263403 is an equidigital number, since it uses as much as digits as its factorization.

216411263403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72137087804.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 216411263403 in words is "two hundred sixteen billion, four hundred eleven million, two hundred sixty-three thousand, four hundred three".