55585751909 has 2 divisors, whose sum is σ = 55585751910. Its totient is φ = 55585751908.

The previous prime is 55585751899. The next prime is 55585751941. The reversal of 55585751909 is 90915758555.

55585751909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55483802500 + 101949409 = 235550^2 + 10097^2 .

It is a cyclic number.

It is not a de Polignac number, because 55585751909 - 2²⁴ = 55568974693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55585751999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27792875954 + 27792875955.

It is an arithmetic number, because the mean of its divisors is an integer number (27792875955).

Almost surely, 2^55585751909 is an apocalyptic number.

It is an amenable number.

55585751909 is a deficient number, since it is larger than the sum of its proper divisors (1).

55585751909 is an equidigital number, since it uses as much as digits as its factorization.

55585751909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14175000, while the sum is 59.

The spelling of 55585751909 in words is "fifty-five billion, five hundred eighty-five million, seven hundred fifty-one thousand, nine hundred nine".