16464821817 has 16 divisors (see below), whose sum is σ = 22236289920. Its totient is φ = 10835624832.

The previous prime is 16464821729. The next prime is 16464821839. The reversal of 16464821817 is 71812846461.

It is not a de Polignac number, because 16464821817 - 2¹¹ = 16464819769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16464820817) 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 15 ways as a sum of consecutive naturals, for example, 13909 + ... + 181997.

It is an arithmetic number, because the mean of its divisors is an integer number (1389768120).

Almost surely, 2^16464821817 is an apocalyptic number.

It is an amenable number.

16464821817 is a deficient number, since it is larger than the sum of its proper divisors (5771468103).

16464821817 is a wasteful number, since it uses less digits than its factorization.

16464821817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168512.

The product of its digits is 516096, while the sum is 48.

The spelling of 16464821817 in words is "sixteen billion, four hundred sixty-four million, eight hundred twenty-one thousand, eight hundred seventeen".