549989945 has 16 divisors (see below), whose sum is σ = 669332160. Its totient is φ = 433800000.

The previous prime is 549989939. The next prime is 549989963.

549989945 is nontrivially palindromic in base 10.

549989945 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 549989945 - 2⁸ = 549989689 is a prime.

It is a super-2 number, since 2×549989945² = 604977879202206050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124586 + ... + 128924.

It is an arithmetic number, because the mean of its divisors is an integer number (41833260).

Almost surely, 2^549989945 is an apocalyptic number.

It is an amenable number.

549989945 is a deficient number, since it is larger than the sum of its proper divisors (119342215).

549989945 is a wasteful number, since it uses less digits than its factorization.

549989945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696.

The product of its digits is 20995200, while the sum is 62.

The square root of 549989945 is about 23451.8644248171. The cubic root of 549989945 is about 819.3162776761.

The spelling of 549989945 in words is "five hundred forty-nine million, nine hundred eighty-nine thousand, nine hundred forty-five".