16651628180 has 48 divisors (see below), whose sum is σ = 40391338176. Its totient is φ = 5698951680.

The previous prime is 16651628153. The next prime is 16651628183. The reversal of 16651628180 is 8182615661.

It is a super-2 number, since 2×16651628180² (a number of 21 digits) contains 22 as substring.

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 a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651628183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2222414 + ... + 2229893.

It is an arithmetic number, because the mean of its divisors is an integer number (841486212).

Almost surely, 2^16651628180 is an apocalyptic number.

16651628180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16651628180 is an abundant number, since it is smaller than the sum of its proper divisors (23739709996).

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

16651628180 is a wasteful number, since it uses less digits than its factorization.

16651628180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452344 (or 4452342 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 16651628180 in words is "sixteen billion, six hundred fifty-one million, six hundred twenty-eight thousand, one hundred eighty".