16268118608561 has 8 divisors (see below), whose sum is σ = 16793556738048. Its totient is φ = 15742721736000.

The previous prime is 16268118608557. The next prime is 16268118608593. The reversal of 16268118608561 is 16580681186261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16268118608561 - 2² = 16268118608557 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 16268118608561.

It is not an unprimeable number, because it can be changed into a prime (16268118608551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9511880 + ... + 11091081.

It is an arithmetic number, because the mean of its divisors is an integer number (2099194592256).

Almost surely, 2^{16268118608561} is an apocalyptic number.

It is an amenable number.

16268118608561 is a deficient number, since it is larger than the sum of its proper divisors (525438129487).

16268118608561 is a wasteful number, since it uses less digits than its factorization.

16268118608561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20628463.

The product of its (nonzero) digits is 6635520, while the sum is 59.

The spelling of 16268118608561 in words is "sixteen trillion, two hundred sixty-eight billion, one hundred eighteen million, six hundred eight thousand, five hundred sixty-one".