2168809654 has 16 divisors (see below), whose sum is σ = 3549692160. Its totient is φ = 985619560.

The previous prime is 2168809627. The next prime is 2168809681. The reversal of 2168809654 is 4569088612.

It is an interprime number because it is at equal distance from previous prime (2168809627) and next prime (2168809681).

It is a junction number, because it is equal to n+sod(n) for n = 2168809598 and 2168809607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170727 + ... + 182989.

It is an arithmetic number, because the mean of its divisors is an integer number (221855760).

Almost surely, 2^2168809654 is an apocalyptic number.

2168809654 is a deficient number, since it is larger than the sum of its proper divisors (1380882506).

2168809654 is a wasteful number, since it uses less digits than its factorization.

2168809654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20315.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 2168809654 is about 46570.4804999905. The cubic root of 2168809654 is about 1294.4158213475.

The spelling of 2168809654 in words is "two billion, one hundred sixty-eight million, eight hundred nine thousand, six hundred fifty-four".