549780669 has 32 divisors (see below), whose sum is σ = 843089280. Its totient is φ = 353808000.

The previous prime is 549780653. The next prime is 549780689. The reversal of 549780669 is 966087945.

It is not a de Polignac number, because 549780669 - 2⁴ = 549780653 is a prime.

It is a super-2 number, since 2×549780669² = 604517568012175122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549780689) 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, 128769 + ... + 132969.

It is an arithmetic number, because the mean of its divisors is an integer number (26346540).

Almost surely, 2^549780669 is an apocalyptic number.

It is an amenable number.

549780669 is a deficient number, since it is larger than the sum of its proper divisors (293308611).

549780669 is a wasteful number, since it uses less digits than its factorization.

549780669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378 (or 4372 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 549780669 is about 23447.4021801990. The cubic root of 549780669 is about 819.2123454816.

The spelling of 549780669 in words is "five hundred forty-nine million, seven hundred eighty thousand, six hundred sixty-nine".