2189654667 has 16 divisors (see below), whose sum is σ = 3305141280. Its totient is φ = 1432226016.

The previous prime is 2189654653. The next prime is 2189654693. The reversal of 2189654667 is 7664569812.

2189654667 is a `hidden beast` number, since 2 + 1 + 8 + 96 + 546 + 6 + 7 = 666.

It is not a de Polignac number, because 2189654667 - 2⁶ = 2189654603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2189650667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763648 + ... + 766509.

It is an arithmetic number, because the mean of its divisors is an integer number (206571330).

Almost surely, 2^2189654667 is an apocalyptic number.

2189654667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2189654667 is a deficient number, since it is larger than the sum of its proper divisors (1115486613).

2189654667 is a wasteful number, since it uses less digits than its factorization.

2189654667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530219 (or 1530213 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 2189654667 is about 46793.7460244422. The cubic root of 2189654667 is about 1298.5495987697.

The spelling of 2189654667 in words is "two billion, one hundred eighty-nine million, six hundred fifty-four thousand, six hundred sixty-seven".