16440171287 has 8 divisors (see below), whose sum is σ = 17318570160. Its totient is φ = 15563085120.

The previous prime is 16440171277. The next prime is 16440171329. The reversal of 16440171287 is 78217104461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16440171287 - 2⁴ = 16440171271 is a prime.

It is a super-3 number, since 3×16440171287³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440171217) 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, 302408 + ... + 352605.

It is an arithmetic number, because the mean of its divisors is an integer number (2164821270).

Almost surely, 2^16440171287 is an apocalyptic number.

16440171287 is a deficient number, since it is larger than the sum of its proper divisors (878398873).

16440171287 is a wasteful number, since it uses less digits than its factorization.

16440171287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656353.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 16440171287 in words is "sixteen billion, four hundred forty million, one hundred seventy-one thousand, two hundred eighty-seven".