194028040081 has 8 divisors (see below), whose sum is σ = 196957394144. Its totient is φ = 191117646720.

The previous prime is 194028039941. The next prime is 194028040093. The reversal of 194028040081 is 180040820491.

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 194028040081 - 2¹⁹ = 194027515793 is a prime.

It is a super-2 number, since 2×194028040081² (a number of 23 digits) contains 22 as substring.

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 194028040081.

It is not an unprimeable number, because it can be changed into a prime (194028043081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4719555 + ... + 4760488.

It is an arithmetic number, because the mean of its divisors is an integer number (24619674268).

Almost surely, 2^194028040081 is an apocalyptic number.

It is an amenable number.

194028040081 is a deficient number, since it is larger than the sum of its proper divisors (2929354063).

194028040081 is an equidigital number, since it uses as much as digits as its factorization.

194028040081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9480351.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 194028040081 in words is "one hundred ninety-four billion, twenty-eight million, forty thousand, eighty-one".