216544234654 has 24 divisors (see below), whose sum is σ = 357304490424. Its totient is φ = 98353398000.

The previous prime is 216544234651. The next prime is 216544234691. The reversal of 216544234654 is 456432445612.

216544234654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216544234654² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216544234651) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 29052 + ... + 658735.

It is an arithmetic number, because the mean of its divisors is an integer number (14887687101).

Almost surely, 2^216544234654 is an apocalyptic number.

216544234654 is a deficient number, since it is larger than the sum of its proper divisors (140760255770).

216544234654 is a wasteful number, since it uses less digits than its factorization.

216544234654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689112 (or 689101 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 46.

The spelling of 216544234654 in words is "two hundred sixteen billion, five hundred forty-four million, two hundred thirty-four thousand, six hundred fifty-four".