2167540849 has 4 divisors (see below), whose sum is σ = 2169134820. Its totient is φ = 2165946880.

The previous prime is 2167540831. The next prime is 2167540897. The reversal of 2167540849 is 9480457612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 677040400 + 1490500449 = 26020^2 + 38607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2167540849 - 2⁷ = 2167540721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2167540799 and 2167540808.

It is not an unprimeable number, because it can be changed into a prime (2167540049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794944 + ... + 797665.

It is an arithmetic number, because the mean of its divisors is an integer number (542283705).

Almost surely, 2^2167540849 is an apocalyptic number.

It is an amenable number.

2167540849 is a deficient number, since it is larger than the sum of its proper divisors (1593971).

2167540849 is a wasteful number, since it uses less digits than its factorization.

2167540849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593970.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 2167540849 is about 46556.8560901614. The cubic root of 2167540849 is about 1294.1633508060.

The spelling of 2167540849 in words is "two billion, one hundred sixty-seven million, five hundred forty thousand, eight hundred forty-nine".