194685000077 has 4 divisors (see below), whose sum is σ = 194697128700. Its totient is φ = 194672871456.

The previous prime is 194685000061. The next prime is 194685000101. The reversal of 194685000077 is 770000586491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105268451401 + 89416548676 = 324451^2 + 299026^2 .

It is a cyclic number.

It is not a de Polignac number, because 194685000077 - 2⁴ = 194685000061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194684999995 and 194685000040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194685000047) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6040202 + ... + 6072347.

It is an arithmetic number, because the mean of its divisors is an integer number (48674282175).

It is a Poulet number, since it divides 2^194685000076-1.

Almost surely, 2^194685000077 is an apocalyptic number.

It is an amenable number.

194685000077 is a deficient number, since it is larger than the sum of its proper divisors (12128623).

194685000077 is a wasteful number, since it uses less digits than its factorization.

194685000077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12128622.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 194685000077 in words is "one hundred ninety-four billion, six hundred eighty-five million, seventy-seven", and thus it is an aban number.