16960139556361 has 9 divisors (see below), whose sum is σ = 17899842058893. Its totient is φ = 16067426503500.

The previous prime is 16960139556343. The next prime is 16960139556431. The reversal of 16960139556361 is 16365593106961.

The square root of 16960139556361 is 4118269.

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

It is not a de Polignac number, because 16960139556361 - 2⁵ = 16960139556329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16960139556361.

It is not an unprimeable number, because it can be changed into a prime (16960139553361) 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, 78138736 + ... + 78355486.

It is an arithmetic number, because the mean of its divisors is an integer number (1988871339877).

Almost surely, 2^{16960139556361} is an apocalyptic number.

16960139556361 is the 4118269-th square number.

16960139556361 is the 2059135-th centered octagonal number.

It is an amenable number.

16960139556361 is a deficient number, since it is larger than the sum of its proper divisors (939702502532).

16960139556361 is an frugal number, since it uses more digits than its factorization.

16960139556361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433540 (or 216770 counting only the distinct ones).

The product of its (nonzero) digits is 23619600, while the sum is 61.

The spelling of 16960139556361 in words is "sixteen trillion, nine hundred sixty billion, one hundred thirty-nine million, five hundred fifty-six thousand, three hundred sixty-one".