216617788454 has 16 divisors (see below), whose sum is σ = 333282418560. Its totient is φ = 105530485440.

The previous prime is 216617788423. The next prime is 216617788483. The reversal of 216617788454 is 454887716612.

216617788454 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×216617788454³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216617788393 and 216617788402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645334 + ... + 1772105.

It is an arithmetic number, because the mean of its divisors is an integer number (20830151160).

Almost surely, 2^216617788454 is an apocalyptic number.

216617788454 is a deficient number, since it is larger than the sum of its proper divisors (116664630106).

216617788454 is a wasteful number, since it uses less digits than its factorization.

216617788454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418255.

The product of its digits is 18063360, while the sum is 59.

The spelling of 216617788454 in words is "two hundred sixteen billion, six hundred seventeen million, seven hundred eighty-eight thousand, four hundred fifty-four".