549666945 has 32 divisors (see below), whose sum is σ = 978531840. Its totient is φ = 292752000.

The previous prime is 549666881. The next prime is 549666989.

549666945 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 549666945 - 2⁶ = 549666881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 549666891 and 549666900.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113320 + ... + 118070.

It is an arithmetic number, because the mean of its divisors is an integer number (30579120).

Almost surely, 2^549666945 is an apocalyptic number.

It is an amenable number.

549666945 is a deficient number, since it is larger than the sum of its proper divisors (428864895).

549666945 is a wasteful number, since it uses less digits than its factorization.

549666945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622 (or 5616 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The square root of 549666945 is about 23444.9769673591. The cubic root of 549666945 is about 819.1558559671.

The spelling of 549666945 in words is "five hundred forty-nine million, six hundred sixty-six thousand, nine hundred forty-five".