101205550555566 has 16 divisors (see below), whose sum is σ = 203061940668288. Its totient is φ = 33626710259000.

The previous prime is 101205550555537. The next prime is 101205550555579. The reversal of 101205550555566 is 665555055502101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27118312860 + ... + 27118316591.

It is an arithmetic number, because the mean of its divisors is an integer number (12691371291768).

Almost surely, 2^{101205550555566} is an apocalyptic number.

101205550555566 is an abundant number, since it is smaller than the sum of its proper divisors (101856390112722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101205550555566 is a wasteful number, since it uses less digits than its factorization.

101205550555566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54236629767.

The product of its (nonzero) digits is 5625000, while the sum is 51.

The spelling of 101205550555566 in words is "one hundred one trillion, two hundred five billion, five hundred fifty million, five hundred fifty-five thousand, five hundred sixty-six".