16996597641 has 9 divisors (see below), whose sum is σ = 24551205991. Its totient is φ = 11330804352.

The previous prime is 16996597627. The next prime is 16996597691. The reversal of 16996597641 is 14679569961.

The square root of 16996597641 is 130371.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10025015625 + 6971582016 = 100125^2 + 83496^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 16996597641 - 2⁵ = 16996597609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16996597621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 369385 + ... + 412841.

Almost surely, 2^16996597641 is an apocalyptic number.

16996597641 is the 130371-st square number.

16996597641 is the 65186-th centered octagonal number.

It is an amenable number.

16996597641 is a deficient number, since it is larger than the sum of its proper divisors (7554608350).

16996597641 is an frugal number, since it uses more digits than its factorization.

16996597641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86920 (or 43460 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The spelling of 16996597641 in words is "sixteen billion, nine hundred ninety-six million, five hundred ninety-seven thousand, six hundred forty-one".