216535645455 has 64 divisors (see below), whose sum is σ = 367392706560. Its totient is φ = 108716138496.

The previous prime is 216535645427. The next prime is 216535645483. The reversal of 216535645455 is 554546535612.

It is an interprime number because it is at equal distance from previous prime (216535645427) and next prime (216535645483).

It is not a de Polignac number, because 216535645455 - 2⁸ = 216535645199 is a prime.

It is a super-2 number, since 2×216535645455² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216535645398 and 216535645407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10782754 + ... + 10802816.

It is an arithmetic number, because the mean of its divisors is an integer number (5740511040).

Almost surely, 2^216535645455 is an apocalyptic number.

216535645455 is a deficient number, since it is larger than the sum of its proper divisors (150857061105).

216535645455 is a wasteful number, since it uses less digits than its factorization.

216535645455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20720.

The product of its digits is 10800000, while the sum is 51.

The spelling of 216535645455 in words is "two hundred sixteen billion, five hundred thirty-five million, six hundred forty-five thousand, four hundred fifty-five".