194895498689 has 2 divisors, whose sum is σ = 194895498690. Its totient is φ = 194895498688.

The previous prime is 194895498667. The next prime is 194895498727. The reversal of 194895498689 is 986894598491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184538976400 + 10356522289 = 429580^2 + 101767^2 .

It is an emirp because it is prime and its reverse (986894598491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194895498689 - 2¹⁶ = 194895433153 is a prime.

It is not a weakly prime, because it can be changed into another prime (194895492689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97447749344 + 97447749345.

It is an arithmetic number, because the mean of its divisors is an integer number (97447749345).

Almost surely, 2^194895498689 is an apocalyptic number.

It is an amenable number.

194895498689 is a deficient number, since it is larger than the sum of its proper divisors (1).

194895498689 is an equidigital number, since it uses as much as digits as its factorization.

194895498689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612431360, while the sum is 80.

The spelling of 194895498689 in words is "one hundred ninety-four billion, eight hundred ninety-five million, four hundred ninety-eight thousand, six hundred eighty-nine".