1866835500055 has 16 divisors (see below), whose sum is σ = 2307699594144. Its totient is φ = 1448714298240.

The previous prime is 1866835500041. The next prime is 1866835500097. The reversal of 1866835500055 is 5500055386681.

It is a happy number.

It is not a de Polignac number, because 1866835500055 - 2¹¹ = 1866835498007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1866835499975 and 1866835500011.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15181972 + ... + 15304441.

It is an arithmetic number, because the mean of its divisors is an integer number (144231224634).

Almost surely, 2^{1866835500055} is an apocalyptic number.

1866835500055 is a deficient number, since it is larger than the sum of its proper divisors (440864094089).

1866835500055 is a wasteful number, since it uses less digits than its factorization.

1866835500055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30486786.

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 1866835500055 in words is "one trillion, eight hundred sixty-six billion, eight hundred thirty-five million, five hundred thousand, fifty-five".