194442521155 has 8 divisors (see below), whose sum is σ = 233354852352. Its totient is φ = 155538132288.

The previous prime is 194442521131. The next prime is 194442521243. The reversal of 194442521155 is 551125244491.

194442521155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194442521155 - 2⁵ = 194442521123 is a prime.

It is a super-2 number, since 2×194442521155² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1931587 + ... + 2029756.

It is an arithmetic number, because the mean of its divisors is an integer number (29169356544).

Almost surely, 2^194442521155 is an apocalyptic number.

194442521155 is a deficient number, since it is larger than the sum of its proper divisors (38912331197).

194442521155 is an equidigital number, since it uses as much as digits as its factorization.

194442521155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971165.

The product of its digits is 288000, while the sum is 43.

The spelling of 194442521155 in words is "one hundred ninety-four billion, four hundred forty-two million, five hundred twenty-one thousand, one hundred fifty-five".