55717228549 has 2 divisors, whose sum is σ = 55717228550. Its totient is φ = 55717228548.

The previous prime is 55717228499. The next prime is 55717228571. The reversal of 55717228549 is 94582271755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41049596449 + 14667632100 = 202607^2 + 121110^2 .

It is a cyclic number.

It is not a de Polignac number, because 55717228549 - 2¹³ = 55717220357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55717228549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55717228579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27858614274 + 27858614275.

It is an arithmetic number, because the mean of its divisors is an integer number (27858614275).

Almost surely, 2^55717228549 is an apocalyptic number.

It is an amenable number.

55717228549 is a deficient number, since it is larger than the sum of its proper divisors (1).

55717228549 is an equidigital number, since it uses as much as digits as its factorization.

55717228549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 55.

The spelling of 55717228549 in words is "fifty-five billion, seven hundred seventeen million, two hundred twenty-eight thousand, five hundred forty-nine".