16720503915969 has 48 divisors (see below), whose sum is σ = 27763158838272. Its totient is φ = 9498829129344.

The previous prime is 16720503915961. The next prime is 16720503916031. The reversal of 16720503915969 is 96951930502761.

16720503915969 is a `hidden beast` number, since 1 + 6 + 7 + 2 + 0 + 5 + 0 + 39 + 1 + 596 + 9 = 666.

It is not a de Polignac number, because 16720503915969 - 2³ = 16720503915961 is a prime.

It is a super-2 number, since 2×16720503915969² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (16720503915961) 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, 299552907 + ... + 299608719.

It is an arithmetic number, because the mean of its divisors is an integer number (578399142464).

Almost surely, 2^{16720503915969} is an apocalyptic number.

It is an amenable number.

16720503915969 is a deficient number, since it is larger than the sum of its proper divisors (11042654922303).

16720503915969 is a wasteful number, since it uses less digits than its factorization.

16720503915969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83486 (or 83483 counting only the distinct ones).

The product of its (nonzero) digits is 27556200, while the sum is 63.

The spelling of 16720503915969 in words is "sixteen trillion, seven hundred twenty billion, five hundred three million, nine hundred fifteen thousand, nine hundred sixty-nine".