194223686555 has 4 divisors (see below), whose sum is σ = 233068423872. Its totient is φ = 155378949240.

The previous prime is 194223686539. The next prime is 194223686621. The reversal of 194223686555 is 555686322491.

It is a happy number.

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

It is not a de Polignac number, because 194223686555 - 2⁴ = 194223686539 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 194223686555.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19422368651 + ... + 19422368660.

It is an arithmetic number, because the mean of its divisors is an integer number (58267105968).

Almost surely, 2^194223686555 is an apocalyptic number.

194223686555 is a deficient number, since it is larger than the sum of its proper divisors (38844737317).

194223686555 is an equidigital number, since it uses as much as digits as its factorization.

194223686555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38844737316.

The product of its digits is 15552000, while the sum is 56.

The spelling of 194223686555 in words is "one hundred ninety-four billion, two hundred twenty-three million, six hundred eighty-six thousand, five hundred fifty-five".