1555016482009 has 9 divisors (see below), whose sum is σ = 1557818547519. Its totient is φ = 1552219454280.

The previous prime is 1555016482001. The next prime is 1555016482037. The reversal of 1555016482009 is 9002846105551.

The square root of 1555016482009 is 1247003.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3068606025 + 1551947875984 = 55395^2 + 1245772^2 .

It is not a de Polignac number, because 1555016482009 - 2³ = 1555016482001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1555016482009.

It is not an unprimeable number, because it can be changed into a prime (1555016482001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1263213424 + ... + 1263214654.

Almost surely, 2^{1555016482009} is an apocalyptic number.

1555016482009 is the 1247003-rd square number.

1555016482009 is the 623502-nd centered octagonal number.

It is an amenable number.

1555016482009 is a deficient number, since it is larger than the sum of its proper divisors (2802065510).

1555016482009 is an frugal number, since it uses more digits than its factorization.

1555016482009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488 (or 2244 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 46.

The spelling of 1555016482009 in words is "one trillion, five hundred fifty-five billion, sixteen million, four hundred eighty-two thousand, nine".