16444456140 has 48 divisors (see below), whose sum is σ = 52622260992. Its totient is φ = 3758732736.

The previous prime is 16444456117. The next prime is 16444456141. The reversal of 16444456140 is 4165444461.

It is a super-3 number, since 3×16444456140³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16444456141) 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, 19576314 + ... + 19577153.

It is an arithmetic number, because the mean of its divisors is an integer number (1096297104).

Almost surely, 2^16444456140 is an apocalyptic number.

16444456140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16444456140 is an abundant number, since it is smaller than the sum of its proper divisors (36177804852).

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

16444456140 is a wasteful number, since it uses less digits than its factorization.

16444456140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39153486 (or 39153484 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 16444456140 in words is "sixteen billion, four hundred forty-four million, four hundred fifty-six thousand, one hundred forty".