1626049909 has 6 divisors (see below), whose sum is σ = 1787311190. Its totient is φ = 1478227080.

The previous prime is 1626049903. The next prime is 1626049921. The reversal of 1626049909 is 9099406261.

It can be written as a sum of positive squares in only one way, i.e., 1016206884 + 609843025 = 31878^2 + 24695^2 .

It is not a de Polignac number, because 1626049909 - 2⁷ = 1626049781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1626049903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6719094 + ... + 6719335.

Almost surely, 2^1626049909 is an apocalyptic number.

It is an amenable number.

1626049909 is a deficient number, since it is larger than the sum of its proper divisors (161261281).

1626049909 is a wasteful number, since it uses less digits than its factorization.

1626049909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13438451 (or 13438440 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 1626049909 is about 40324.3091571325. The cubic root of 1626049909 is about 1175.9204880624.

The spelling of 1626049909 in words is "one billion, six hundred twenty-six million, forty-nine thousand, nine hundred nine".