1025550009 has 12 divisors (see below), whose sum is σ = 1616018352. Its totient is φ = 621545400.

The previous prime is 1025549999. The next prime is 1025550037. The reversal of 1025550009 is 9000555201.

1025550009 is a `hidden beast` number, since 102 + 5 + 550 + 0 + 0 + 9 = 666.

1025550009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1025550009 - 2⁸ = 1025549753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1025550049) 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, 5179447 + ... + 5179644.

It is an arithmetic number, because the mean of its divisors is an integer number (134668196).

Almost surely, 2^1025550009 is an apocalyptic number.

It is an amenable number.

1025550009 is a deficient number, since it is larger than the sum of its proper divisors (590468343).

1025550009 is a wasteful number, since it uses less digits than its factorization.

1025550009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359108 (or 10359105 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 1025550009 is about 32024.2097326382. The cubic root of 1025550009 is about 1008.4451483649.

The spelling of 1025550009 in words is "one billion, twenty-five million, five hundred fifty thousand, nine".