55209609523 has 2 divisors, whose sum is σ = 55209609524. Its totient is φ = 55209609522.

The previous prime is 55209609463. The next prime is 55209609569. The reversal of 55209609523 is 32590690255.

It is an a-pointer prime, because the next prime (55209609569) can be obtained adding 55209609523 to its sum of digits (46).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55209609523 - 2⁹ = 55209609011 is a prime.

It is not a weakly prime, because it can be changed into another prime (55209609823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27604804761 + 27604804762.

It is an arithmetic number, because the mean of its divisors is an integer number (27604804762).

Almost surely, 2^55209609523 is an apocalyptic number.

55209609523 is a deficient number, since it is larger than the sum of its proper divisors (1).

55209609523 is an equidigital number, since it uses as much as digits as its factorization.

55209609523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729000, while the sum is 46.

The spelling of 55209609523 in words is "fifty-five billion, two hundred nine million, six hundred nine thousand, five hundred twenty-three".