28194144155 has 8 divisors (see below), whose sum is σ = 33847377984. Its totient is φ = 22545712000.

The previous prime is 28194144131. The next prime is 28194144163. The reversal of 28194144155 is 55144149182.

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

It is not a de Polignac number, because 28194144155 - 2²⁴ = 28177366939 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187486 + ... + 1210995.

It is an arithmetic number, because the mean of its divisors is an integer number (4230922248).

Almost surely, 2^28194144155 is an apocalyptic number.

28194144155 is a deficient number, since it is larger than the sum of its proper divisors (5653233829).

28194144155 is a wasteful number, since it uses less digits than its factorization.

28194144155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400837.

The product of its digits is 230400, while the sum is 44.

The spelling of 28194144155 in words is "twenty-eight billion, one hundred ninety-four million, one hundred forty-four thousand, one hundred fifty-five".