55615738099217 has 4 divisors (see below), whose sum is σ = 55625569417956. Its totient is φ = 55605906780480.

The previous prime is 55615738099147. The next prime is 55615738099219. The reversal of 55615738099217 is 71299083751655.

It is a Cunningham number, because it is equal to 7457596²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5537343160336 + 50078394938881 = 2353156^2 + 7076609^2 .

It is a cyclic number.

It is not a de Polignac number, because 55615738099217 - 2¹² = 55615738095121 is a prime.

It is a super-2 number, since 2×55615738099217² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55615738099219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4915650884 + ... + 4915662197.

It is an arithmetic number, because the mean of its divisors is an integer number (13906392354489).

Almost surely, 2^{55615738099217} is an apocalyptic number.

It is an amenable number.

55615738099217 is a deficient number, since it is larger than the sum of its proper divisors (9831318739).

55615738099217 is an equidigital number, since it uses as much as digits as its factorization.

55615738099217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9831318738.

The product of its (nonzero) digits is 142884000, while the sum is 68.

The spelling of 55615738099217 in words is "fifty-five trillion, six hundred fifteen billion, seven hundred thirty-eight million, ninety-nine thousand, two hundred seventeen".