195663109390561 has 8 divisors (see below), whose sum is σ = 207360530648064. Its totient is φ = 183986557753920.

The previous prime is 195663109390543. The next prime is 195663109390579. The reversal of 195663109390561 is 165093901366591.

It is an interprime number because it is at equal distance from previous prime (195663109390543) and next prime (195663109390579).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195663109390561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195663109390493 and 195663109390502.

It is not an unprimeable number, because it can be changed into a prime (195663109393561) 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, 5217385905 + ... + 5217423406.

It is an arithmetic number, because the mean of its divisors is an integer number (25920066331008).

Almost surely, 2^{195663109390561} is an apocalyptic number.

It is an amenable number.

195663109390561 is a deficient number, since it is larger than the sum of its proper divisors (11697421257503).

195663109390561 is a wasteful number, since it uses less digits than its factorization.

195663109390561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10434810431.

The product of its (nonzero) digits is 35429400, while the sum is 64.

The spelling of 195663109390561 in words is "one hundred ninety-five trillion, six hundred sixty-three billion, one hundred nine million, three hundred ninety thousand, five hundred sixty-one".