16859622864 has 120 divisors (see below), whose sum is σ = 50705379648. Its totient is φ = 4813186560.

The previous prime is 16859622853. The next prime is 16859622869. The reversal of 16859622864 is 46822695861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16859622869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4342204 + ... + 4346084.

Almost surely, 2^16859622864 is an apocalyptic number.

16859622864 is a gapful number since it is divisible by the number (14) 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 16859622864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25352689824).

16859622864 is an abundant number, since it is smaller than the sum of its proper divisors (33845756784).

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

16859622864 is a wasteful number, since it uses less digits than its factorization.

16859622864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753 (or 5740 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The spelling of 16859622864 in words is "sixteen billion, eight hundred fifty-nine million, six hundred twenty-two thousand, eight hundred sixty-four".