55166522055519 has 16 divisors (see below), whose sum is σ = 84136306728960. Its totient is φ = 31496338754400.

The previous prime is 55166522055517. The next prime is 55166522055539. The reversal of 55166522055519 is 91555022566155.

It is a happy number.

It is not a de Polignac number, because 55166522055519 - 2¹ = 55166522055517 is a prime.

It is a super-2 number, since 2×55166522055519² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166522055517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141147524 + ... + 1141195865.

It is an arithmetic number, because the mean of its divisors is an integer number (5258519170560).

Almost surely, 2^{55166522055519} is an apocalyptic number.

55166522055519 is a deficient number, since it is larger than the sum of its proper divisors (28969784673441).

55166522055519 is a wasteful number, since it uses less digits than its factorization.

55166522055519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282344550.

The product of its (nonzero) digits is 20250000, while the sum is 57.

The spelling of 55166522055519 in words is "fifty-five trillion, one hundred sixty-six billion, five hundred twenty-two million, fifty-five thousand, five hundred nineteen".