549678261 has 8 divisors (see below), whose sum is σ = 799532064. Its totient is φ = 333138320.

The previous prime is 549678257. The next prime is 549678293. The reversal of 549678261 is 162876945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549678261 - 2² = 549678257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549678261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549678061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8328426 + ... + 8328491.

It is an arithmetic number, because the mean of its divisors is an integer number (99941508).

Almost surely, 2^549678261 is an apocalyptic number.

It is an amenable number.

549678261 is a deficient number, since it is larger than the sum of its proper divisors (249853803).

549678261 is a wasteful number, since it uses less digits than its factorization.

549678261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16656931.

The product of its digits is 725760, while the sum is 48.

The square root of 549678261 is about 23445.2182971283. The cubic root of 549678261 is about 819.1614772523.

The spelling of 549678261 in words is "five hundred forty-nine million, six hundred seventy-eight thousand, two hundred sixty-one".