194756174807081 has 2 divisors, whose sum is σ = 194756174807082. Its totient is φ = 194756174807080.

The previous prime is 194756174806969. The next prime is 194756174807099. The reversal of 194756174807081 is 180708471657491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184026724266025 + 10729450541056 = 13565645^2 + 3275584^2 .

It is a cyclic number.

It is not a de Polignac number, because 194756174807081 - 2⁴⁶ = 124387430629417 is a prime.

It is a super-2 number, since 2×194756174807081² (a number of 29 digits) contains 22 as substring.

It is a weakly prime.

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 as a sum of consecutive naturals, namely, 97378087403540 + 97378087403541.

It is an arithmetic number, because the mean of its divisors is an integer number (97378087403541).

Almost surely, 2^{194756174807081} is an apocalyptic number.

It is an amenable number.

194756174807081 is a deficient number, since it is larger than the sum of its proper divisors (1).

194756174807081 is an equidigital number, since it uses as much as digits as its factorization.

194756174807081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94832640, while the sum is 68.

The spelling of 194756174807081 in words is "one hundred ninety-four trillion, seven hundred fifty-six billion, one hundred seventy-four million, eight hundred seven thousand, eighty-one".