16626802816 has 64 divisors (see below), whose sum is σ = 36541877400. Its totient is φ = 7486709760.

The previous prime is 16626802811. The next prime is 16626802817. The reversal of 16626802816 is 61820862661.

It can be written as a sum of positive squares in 4 ways, for example, as 6406401600 + 10220401216 = 80040^2 + 101096^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (16626802811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53631 + ... + 190078.

Almost surely, 2^16626802816 is an apocalyptic number.

16626802816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16626802816 is an abundant number, since it is smaller than the sum of its proper divisors (19915074584).

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

16626802816 is a wasteful number, since it uses less digits than its factorization.

16626802816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243777 (or 243765 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 16626802816 in words is "sixteen billion, six hundred twenty-six million, eight hundred two thousand, eight hundred sixteen".