25194352351813 has 2 divisors, whose sum is σ = 25194352351814. Its totient is φ = 25194352351812.

The previous prime is 25194352351799. The next prime is 25194352351853. The reversal of 25194352351813 is 31815325349152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24740208446209 + 454143905604 = 4973953^2 + 673902^2 .

It is a cyclic number.

It is not a de Polignac number, because 25194352351813 - 2⁵ = 25194352351781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25194352351853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597176175906 + 12597176175907.

It is an arithmetic number, because the mean of its divisors is an integer number (12597176175907).

Almost surely, 2^{25194352351813} is an apocalyptic number.

It is an amenable number.

25194352351813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25194352351813 is an equidigital number, since it uses as much as digits as its factorization.

25194352351813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 52.

The spelling of 25194352351813 in words is "twenty-five trillion, one hundred ninety-four billion, three hundred fifty-two million, three hundred fifty-one thousand, eight hundred thirteen".