1868866855355 has 4 divisors (see below), whose sum is σ = 2242640226432. Its totient is φ = 1495093484280.

The previous prime is 1868866855277. The next prime is 1868866855391. The reversal of 1868866855355 is 5535586688681.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1868866855355 - 2¹⁰ = 1868866854331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 186886685531 + ... + 186886685540.

It is an arithmetic number, because the mean of its divisors is an integer number (560660056608).

Almost surely, 2^{1868866855355} is an apocalyptic number.

1868866855355 is a deficient number, since it is larger than the sum of its proper divisors (373773371077).

1868866855355 is an equidigital number, since it uses as much as digits as its factorization.

1868866855355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373773371076.

The product of its digits is 1658880000, while the sum is 74.

The spelling of 1868866855355 in words is "one trillion, eight hundred sixty-eight billion, eight hundred sixty-six million, eight hundred fifty-five thousand, three hundred fifty-five".