216435434117 has 4 divisors (see below), whose sum is σ = 247354781856. Its totient is φ = 185516086380.

The previous prime is 216435434101. The next prime is 216435434129. The reversal of 216435434117 is 711434534612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216435434117 - 2⁴ = 216435434101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216435434177) 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, 15459673859 + ... + 15459673872.

It is an arithmetic number, because the mean of its divisors is an integer number (61838695464).

Almost surely, 2^216435434117 is an apocalyptic number.

It is an amenable number.

216435434117 is a deficient number, since it is larger than the sum of its proper divisors (30919347739).

216435434117 is an equidigital number, since it uses as much as digits as its factorization.

216435434117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30919347738.

The product of its digits is 241920, while the sum is 41.

Adding to 216435434117 its reverse (711434534612), we get a palindrome (927869968729).

The spelling of 216435434117 in words is "two hundred sixteen billion, four hundred thirty-five million, four hundred thirty-four thousand, one hundred seventeen".