55225677509 has 2 divisors, whose sum is σ = 55225677510. Its totient is φ = 55225677508.

The previous prime is 55225677473. The next prime is 55225677517. The reversal of 55225677509 is 90577652255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45552364900 + 9673312609 = 213430^2 + 98353^2 .

It is a cyclic number.

It is not a de Polignac number, because 55225677509 - 2⁸ = 55225677253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55225677809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27612838754 + 27612838755.

It is an arithmetic number, because the mean of its divisors is an integer number (27612838755).

Almost surely, 2^55225677509 is an apocalyptic number.

It is an amenable number.

55225677509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55225677509 is an equidigital number, since it uses as much as digits as its factorization.

55225677509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6615000, while the sum is 53.

The spelling of 55225677509 in words is "fifty-five billion, two hundred twenty-five million, six hundred seventy-seven thousand, five hundred nine".