55530578009 has 2 divisors, whose sum is σ = 55530578010. Its totient is φ = 55530578008.

The previous prime is 55530577961. The next prime is 55530578023. The reversal of 55530578009 is 90087503555.

55530578009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44215575625 + 11315002384 = 210275^2 + 106372^2 .

It is a cyclic number.

It is not a de Polignac number, because 55530578009 - 2¹² = 55530573913 is a prime.

It is a super-3 number, since 3×55530578009³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (55530577009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765289004 + 27765289005.

It is an arithmetic number, because the mean of its divisors is an integer number (27765289005).

Almost surely, 2^55530578009 is an apocalyptic number.

It is an amenable number.

55530578009 is a deficient number, since it is larger than the sum of its proper divisors (1).

55530578009 is an equidigital number, since it uses as much as digits as its factorization.

55530578009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 55530578009 in words is "fifty-five billion, five hundred thirty million, five hundred seventy-eight thousand, nine".