194775658561 has 8 divisors (see below), whose sum is σ = 212485856544. Its totient is φ = 177066013920.

The previous prime is 194775658559. The next prime is 194775658573. The reversal of 194775658561 is 165856577491.

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 194775658561 - 2¹ = 194775658559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194775658493 and 194775658502.

It is not an unprimeable number, because it can be changed into a prime (194775650561) 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, 1017846 + ... + 1193968.

It is an arithmetic number, because the mean of its divisors is an integer number (26560732068).

Almost surely, 2^194775658561 is an apocalyptic number.

194775658561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194775658561 is a deficient number, since it is larger than the sum of its proper divisors (17710197983).

194775658561 is a wasteful number, since it uses less digits than its factorization.

194775658561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276671.

The product of its digits is 63504000, while the sum is 64.

The spelling of 194775658561 in words is "one hundred ninety-four billion, seven hundred seventy-five million, six hundred fifty-eight thousand, five hundred sixty-one".