2117952549 has 16 divisors (see below), whose sum is σ = 3140857600. Its totient is φ = 1410550848.

The previous prime is 2117952547. The next prime is 2117952589. The reversal of 2117952549 is 9452597112.

2117952549 is a `hidden beast` number, since 2 + 1 + 17 + 95 + 2 + 549 = 666.

It is not a de Polignac number, because 2117952549 - 2¹ = 2117952547 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117952541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11629 + ... + 66114.

It is an arithmetic number, because the mean of its divisors is an integer number (196303600).

Almost surely, 2^2117952549 is an apocalyptic number.

It is an amenable number.

2117952549 is a deficient number, since it is larger than the sum of its proper divisors (1022905051).

2117952549 is a wasteful number, since it uses less digits than its factorization.

2117952549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78761 (or 78755 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 2117952549 is about 46021.2184649646. The cubic root of 2117952549 is about 1284.2179678439.

The spelling of 2117952549 in words is "two billion, one hundred seventeen million, nine hundred fifty-two thousand, five hundred forty-nine".