549999999999945 has 96 divisors (see below), whose sum is σ = 1073035590382080. Its totient is φ = 258323380922880.

The previous prime is 549999999999941. The next prime is 549999999999953.

It is a happy number.

549999999999945 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 549999999999945 - 2² = 549999999999941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (549999999999941) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 130613262 + ... + 134758391.

It is an arithmetic number, because the mean of its divisors is an integer number (11177454066480).

Almost surely, 2^{549999999999945} is an apocalyptic number.

549999999999945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

549999999999945 is a deficient number, since it is larger than the sum of its proper divisors (523035590382135).

549999999999945 is a wasteful number, since it uses less digits than its factorization.

549999999999945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265371807 (or 265371804 counting only the distinct ones).

The product of its digits is 12552423843600, while the sum is 117.

It can be divided in two parts, 54 and 9999999999945, that added together give a palindrome (9999999999999).

The spelling of 549999999999945 in words is "five hundred forty-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-five".