216723491544 has 256 divisors, whose sum is σ = 639597772800. Its totient is φ = 59926464000.

The previous prime is 216723491527. The next prime is 216723491573. The reversal of 216723491544 is 445194327612.

216723491544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216723491493 and 216723491502.

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 63 ways as a sum of consecutive naturals, for example, 143429749 + ... + 143431259.

It is an arithmetic number, because the mean of its divisors is an integer number (2498428800).

Almost surely, 2^216723491544 is an apocalyptic number.

216723491544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216723491544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319798886400).

216723491544 is an abundant number, since it is smaller than the sum of its proper divisors (422874281256).

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

216723491544 is a wasteful number, since it uses less digits than its factorization.

216723491544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814 (or 1810 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The spelling of 216723491544 in words is "two hundred sixteen billion, seven hundred twenty-three million, four hundred ninety-one thousand, five hundred forty-four".