216405335244042 has 40 divisors (see below), whose sum is σ = 554180858511456. Its totient is φ = 61830095783688.

The previous prime is 216405335244041. The next prime is 216405335244103. The reversal of 216405335244042 is 240442533504612.

216405335244042 is a `hidden beast` number, since 2 + 1 + 6 + 40 + 5 + 3 + 3 + 524 + 40 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (216405335244041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 95416813348 + ... + 95416815615.

Almost surely, 2^{216405335244042} is an apocalyptic number.

216405335244042 is an abundant number, since it is smaller than the sum of its proper divisors (337775523267414).

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

216405335244042 is a wasteful number, since it uses less digits than its factorization.

216405335244042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190833628984 (or 190833628975 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 45.

Adding to 216405335244042 its reverse (240442533504612), we get a palindrome (456847868748654).

The spelling of 216405335244042 in words is "two hundred sixteen trillion, four hundred five billion, three hundred thirty-five million, two hundred forty-four thousand, forty-two".