2755439861 has 4 divisors (see below), whose sum is σ = 2757517632. Its totient is φ = 2753362092.

The previous prime is 2755439801. The next prime is 2755439887. The reversal of 2755439861 is 1689345572.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2755439861 - 2¹⁰ = 2755438837 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 (2755439801) 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 3 ways as a sum of consecutive naturals, for example, 1036895 + ... + 1039548.

It is an arithmetic number, because the mean of its divisors is an integer number (689379408).

Almost surely, 2^2755439861 is an apocalyptic number.

It is an amenable number.

2755439861 is a deficient number, since it is larger than the sum of its proper divisors (2077771).

2755439861 is a wasteful number, since it uses less digits than its factorization.

2755439861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077770.

The product of its digits is 1814400, while the sum is 50.

The square root of 2755439861 is about 52492.2838234345. The cubic root of 2755439861 is about 1401.9428571347.

The spelling of 2755439861 in words is "two billion, seven hundred fifty-five million, four hundred thirty-nine thousand, eight hundred sixty-one".