16961556270481 has 9 divisors (see below), whose sum is σ = 17197394060721. Its totient is φ = 16728909656832.

The previous prime is 16961556270433. The next prime is 16961556270511. The reversal of 16961556270481 is 18407265516961.

The square root of 16961556270481 is 4118441.

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

It can be written as a sum of positive squares in 4 ways, for example, as 514962676881 + 16446593593600 = 717609^2 + 4055440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16961556270481 is a prime.

It is a super-2 number, since 2×16961556270481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16961556270401) 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 8 ways as a sum of consecutive naturals, for example, 300617985 + ... + 300674401.

Almost surely, 2^{16961556270481} is an apocalyptic number.

16961556270481 is the 4118441-st square number.

16961556270481 is the 2059221-st centered octagonal number.

It is an amenable number.

16961556270481 is a deficient number, since it is larger than the sum of its proper divisors (235837790240).

16961556270481 is an frugal number, since it uses more digits than its factorization.

16961556270481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112980 (or 56490 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 16961556270481 in words is "sixteen trillion, nine hundred sixty-one billion, five hundred fifty-six million, two hundred seventy thousand, four hundred eighty-one".