194785151999993 has 2 divisors, whose sum is σ = 194785151999994. Its totient is φ = 194785151999992.

The previous prime is 194785151999989. The next prime is 194785152000007. The reversal of 194785151999993 is 399999151587491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190793775347344 + 3991376652649 = 13812812^2 + 1997843^2 .

It is a cyclic number.

It is not a de Polignac number, because 194785151999993 - 2² = 194785151999989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194785151999899 and 194785151999908.

It is not a weakly prime, because it can be changed into another prime (194785151999953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97392575999996 + 97392575999997.

It is an arithmetic number, because the mean of its divisors is an integer number (97392575999997).

Almost surely, 2^{194785151999993} is an apocalyptic number.

It is an amenable number.

194785151999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

194785151999993 is an equidigital number, since it uses as much as digits as its factorization.

194785151999993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8928208800, while the sum is 89.

The spelling of 194785151999993 in words is "one hundred ninety-four trillion, seven hundred eighty-five billion, one hundred fifty-one million, nine hundred ninety-nine thousand, nine hundred ninety-three".