194359006861 has 8 divisors (see below), whose sum is σ = 194718456504. Its totient is φ = 193999868160.

The previous prime is 194359006837. The next prime is 194359006901. The reversal of 194359006861 is 168600953491.

It can be written as a sum of positive squares in 4 ways, for example, as 110892330025 + 83466676836 = 333005^2 + 288906^2 .

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 194359006861 - 2²⁷ = 194224789133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194359006799 and 194359006808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194359006661) 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 7 ways as a sum of consecutive naturals, for example, 1192651 + ... + 1345783.

It is an arithmetic number, because the mean of its divisors is an integer number (24339807063).

Almost surely, 2^194359006861 is an apocalyptic number.

It is an amenable number.

194359006861 is a deficient number, since it is larger than the sum of its proper divisors (359449643).

194359006861 is a wasteful number, since it uses less digits than its factorization.

194359006861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155471.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 194359006861 in words is "one hundred ninety-four billion, three hundred fifty-nine million, six thousand, eight hundred sixty-one".