1557603009 has 12 divisors (see below), whose sum is σ = 2288005200. Its totient is φ = 1020801624.

The previous prime is 1557602999. The next prime is 1557603013. The reversal of 1557603009 is 9003067551.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1557603009 is a prime.

It is a super-2 number, since 2×1557603009² = 4852254267291708162, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1557603709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1466139 + ... + 1467200.

It is an arithmetic number, because the mean of its divisors is an integer number (190667100).

Almost surely, 2^1557603009 is an apocalyptic number.

It is an amenable number.

1557603009 is a deficient number, since it is larger than the sum of its proper divisors (730402191).

1557603009 is a wasteful number, since it uses less digits than its factorization.

1557603009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933404 (or 2933401 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 1557603009 is about 39466.4795617750. The cubic root of 1557603009 is about 1159.1836827594.

The spelling of 1557603009 in words is "one billion, five hundred fifty-seven million, six hundred three thousand, nine".