549407765 has 4 divisors (see below), whose sum is σ = 659289324. Its totient is φ = 439526208.

The previous prime is 549407759. The next prime is 549407767. The reversal of 549407765 is 567704945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567704945 = 5 ⋅113540989.

It can be written as a sum of positive squares in 2 ways, for example, as 168143089 + 381264676 = 12967^2 + 19526^2 .

It is a cyclic number.

It is not a de Polignac number, because 549407765 - 2⁶ = 549407701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549407767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54940772 + ... + 54940781.

It is an arithmetic number, because the mean of its divisors is an integer number (164822331).

Almost surely, 2^549407765 is an apocalyptic number.

It is an amenable number.

549407765 is a deficient number, since it is larger than the sum of its proper divisors (109881559).

549407765 is a wasteful number, since it uses less digits than its factorization.

549407765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109881558.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The square root of 549407765 is about 23439.4489056377. The cubic root of 549407765 is about 819.0270857516.

The spelling of 549407765 in words is "five hundred forty-nine million, four hundred seven thousand, seven hundred sixty-five".