549045681 has 32 divisors (see below), whose sum is σ = 785203200. Its totient is φ = 340650240.

The previous prime is 549045659. The next prime is 549045697. The reversal of 549045681 is 186540945.

It is not a de Polignac number, because 549045681 - 2⁵ = 549045649 is a prime.

It is a super-2 number, since 2×549045681² = 602902319649507522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (549045611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256825 + ... + 258953.

It is an arithmetic number, because the mean of its divisors is an integer number (24537600).

Almost surely, 2^549045681 is an apocalyptic number.

It is an amenable number.

549045681 is a deficient number, since it is larger than the sum of its proper divisors (236157519).

549045681 is a wasteful number, since it uses less digits than its factorization.

549045681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 549045681 is about 23431.7238162283. The cubic root of 549045681 is about 818.8471211946.

The spelling of 549045681 in words is "five hundred forty-nine million, forty-five thousand, six hundred eighty-one".