216135516723426 has 48 divisors (see below), whose sum is σ = 475291742328000. Its totient is φ = 70968577182624.

The previous prime is 216135516723349. The next prime is 216135516723527. The reversal of 216135516723426 is 624327615531612.

216135516723426 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 3 + 5 + 516 + 72 + 34 + 26 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65687680 + ... + 68899508.

It is an arithmetic number, because the mean of its divisors is an integer number (9901911298500).

Almost surely, 2^{216135516723426} is an apocalyptic number.

216135516723426 is an abundant number, since it is smaller than the sum of its proper divisors (259156225604574).

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

216135516723426 is a wasteful number, since it uses less digits than its factorization.

216135516723426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267703 (or 3267700 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 216135516723426 in words is "two hundred sixteen trillion, one hundred thirty-five billion, five hundred sixteen million, seven hundred twenty-three thousand, four hundred twenty-six".