55315764172517 has 2 divisors, whose sum is σ = 55315764172518. Its totient is φ = 55315764172516.

The previous prime is 55315764172511. The next prime is 55315764172519. The reversal of 55315764172517 is 71527146751355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52445318383396 + 2870445789121 = 7241914^2 + 1694239^2 .

It is a cyclic number.

It is not a de Polignac number, because 55315764172517 - 2⁸ = 55315764172261 is a prime.

Together with 55315764172519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55315764172511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27657882086258 + 27657882086259.

It is an arithmetic number, because the mean of its divisors is an integer number (27657882086259).

Almost surely, 2^{55315764172517} is an apocalyptic number.

It is an amenable number.

55315764172517 is a deficient number, since it is larger than the sum of its proper divisors (1).

55315764172517 is an equidigital number, since it uses as much as digits as its factorization.

55315764172517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870000, while the sum is 59.

The spelling of 55315764172517 in words is "fifty-five trillion, three hundred fifteen billion, seven hundred sixty-four million, one hundred seventy-two thousand, five hundred seventeen".