55216511620117 has 8 divisors (see below), whose sum is σ = 60480560395800. Its totient is φ = 50176464920064.

The previous prime is 55216511620103. The next prime is 55216511620141. The reversal of 55216511620117 is 71102611561255.

It can be written as a sum of positive squares in 4 ways, for example, as 7679471846596 + 47537039773521 = 2771186^2 + 6894711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55216511620117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55216511620177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56000518392 + ... + 56000519377.

It is an arithmetic number, because the mean of its divisors is an integer number (7560070049475).

Almost surely, 2^{55216511620117} is an apocalyptic number.

It is an amenable number.

55216511620117 is a deficient number, since it is larger than the sum of its proper divisors (5264048775683).

55216511620117 is a wasteful number, since it uses less digits than its factorization.

55216511620117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112001037815.

The product of its (nonzero) digits is 126000, while the sum is 43.

The spelling of 55216511620117 in words is "fifty-five trillion, two hundred sixteen billion, five hundred eleven million, six hundred twenty thousand, one hundred seventeen".