16555715216 has 20 divisors (see below), whose sum is σ = 32190858924. Its totient is φ = 8248396800.

The previous prime is 16555715213. The next prime is 16555715243. The reversal of 16555715216 is 61251755561.

It can be written as a sum of positive squares in 2 ways, for example, as 6294835600 + 10260879616 = 79340^2 + 101296^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16555715213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836665 + ... + 1845656.

Almost surely, 2^16555715216 is an apocalyptic number.

16555715216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16555715216 is a deficient number, since it is larger than the sum of its proper divisors (15635143708).

16555715216 is a wasteful number, since it uses less digits than its factorization.

16555715216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682610 (or 3682604 counting only the distinct ones).

The product of its digits is 315000, while the sum is 44.

The spelling of 16555715216 in words is "sixteen billion, five hundred fifty-five million, seven hundred fifteen thousand, two hundred sixteen".