16440873660 has 144 divisors (see below), whose sum is σ = 52631997600. Its totient is φ = 4142679552.

The previous prime is 16440873643. The next prime is 16440873661. The reversal of 16440873660 is 6637804461.

It is a happy number.

It is a super-3 number, since 3×16440873660³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440873661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1351686 + ... + 1363794.

Almost surely, 2^16440873660 is an apocalyptic number.

16440873660 is a gapful number since it is divisible by the number (10) 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 16440873660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26315998800).

16440873660 is an abundant number, since it is smaller than the sum of its proper divisors (36191123940).

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

16440873660 is a wasteful number, since it uses less digits than its factorization.

16440873660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12540 (or 12535 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 16440873660 in words is "sixteen billion, four hundred forty million, eight hundred seventy-three thousand, six hundred sixty".