16440450287697 has 16 divisors (see below), whose sum is σ = 25788941628480. Its totient is φ = 10315576650816.

The previous prime is 16440450287633. The next prime is 16440450287699. The reversal of 16440450287697 is 79678205404461.

16440450287697 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 0 + 450 + 28 + 76 + 97 = 666.

It is not a de Polignac number, because 16440450287697 - 2⁶ = 16440450287633 is a prime.

It is a super-3 number, since 3×16440450287697³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16440450287699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17908986783 + ... + 17908987700.

It is an arithmetic number, because the mean of its divisors is an integer number (1611808851780).

Almost surely, 2^{16440450287697} is an apocalyptic number.

16440450287697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16440450287697 is a deficient number, since it is larger than the sum of its proper divisors (9348491340783).

16440450287697 is a wasteful number, since it uses less digits than its factorization.

16440450287697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35817974509 (or 35817974503 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 16440450287697 in words is "sixteen trillion, four hundred forty billion, four hundred fifty million, two hundred eighty-seven thousand, six hundred ninety-seven".