2116565846154 has 48 divisors (see below), whose sum is σ = 4618668462408. Its totient is φ = 700486465536.

The previous prime is 2116565846119. The next prime is 2116565846179. The reversal of 2116565846154 is 4516485656112.

2116565846154 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 5 + 6 + 584 + 6 + 1 + 54 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2093302580625 + 23263265529 = 1446825^2 + 152523^2 .

It is a super-2 number, since 2×2116565846154² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2116565846154.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3376594 + ... + 3954050.

Almost surely, 2^{2116565846154} is an apocalyptic number.

2116565846154 is an abundant number, since it is smaller than the sum of its proper divisors (2502102616254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2116565846154 is a wasteful number, since it uses less digits than its factorization.

2116565846154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578919 (or 578916 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 2116565846154 in words is "two trillion, one hundred sixteen billion, five hundred sixty-five million, eight hundred forty-six thousand, one hundred fifty-four".