55166233266155 has 16 divisors (see below), whose sum is σ = 72505334055168. Its totient is φ = 39961052700000.

The previous prime is 55166233266143. The next prime is 55166233266191.

55166233266155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55166233266155 - 2²² = 55166229071851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55166233266155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998038831 + ... + 1998066440.

It is an arithmetic number, because the mean of its divisors is an integer number (4531583378448).

Almost surely, 2^{55166233266155} is an apocalyptic number.

55166233266155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55166233266155 is a deficient number, since it is larger than the sum of its proper divisors (17339100789013).

55166233266155 is a wasteful number, since it uses less digits than its factorization.

55166233266155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996105538.

The product of its digits is 29160000, while the sum is 56.

The spelling of 55166233266155 in words is "fifty-five trillion, one hundred sixty-six billion, two hundred thirty-three million, two hundred sixty-six thousand, one hundred fifty-five".