216726534774 has 24 divisors (see below), whose sum is σ = 470745182232. Its totient is φ = 72062020800.

The previous prime is 216726534743. The next prime is 216726534779. The reversal of 216726534774 is 477435627612.

216726534774 is a `hidden beast` number, since 2 + 16 + 7 + 26 + 534 + 7 + 74 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 216726534774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216726534779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15005704 + ... + 15020139.

It is an arithmetic number, because the mean of its divisors is an integer number (19614382593).

Almost surely, 2^216726534774 is an apocalyptic number.

216726534774 is an abundant number, since it is smaller than the sum of its proper divisors (254018647458).

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

216726534774 is a wasteful number, since it uses less digits than its factorization.

216726534774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30026252 (or 30026249 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 54.

The spelling of 216726534774 in words is "two hundred sixteen billion, seven hundred twenty-six million, five hundred thirty-four thousand, seven hundred seventy-four".