194450625653 has 2 divisors, whose sum is σ = 194450625654. Its totient is φ = 194450625652.

The previous prime is 194450625647. The next prime is 194450625701. The reversal of 194450625653 is 356526054491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159458059684 + 34992565969 = 399322^2 + 187063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194450625653 is a prime.

It is a super-2 number, since 2×194450625653² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194450625053) by changing a digit.

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, 97225312826 + 97225312827.

It is an arithmetic number, because the mean of its divisors is an integer number (97225312827).

Almost surely, 2^194450625653 is an apocalyptic number.

It is an amenable number.

194450625653 is a deficient number, since it is larger than the sum of its proper divisors (1).

194450625653 is an equidigital number, since it uses as much as digits as its factorization.

194450625653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 194450625653 in words is "one hundred ninety-four billion, four hundred fifty million, six hundred twenty-five thousand, six hundred fifty-three".