201696251693813 has 2 divisors, whose sum is σ = 201696251693814. Its totient is φ = 201696251693812.

The previous prime is 201696251693791. The next prime is 201696251693843. The reversal of 201696251693813 is 318396152696102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147528668315044 + 54167583378769 = 12146138^2 + 7359863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201696251693813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201696251693843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100848125846906 + 100848125846907.

It is an arithmetic number, because the mean of its divisors is an integer number (100848125846907).

Almost surely, 2^{201696251693813} is an apocalyptic number.

It is an amenable number.

201696251693813 is a deficient number, since it is larger than the sum of its proper divisors (1).

201696251693813 is an equidigital number, since it uses as much as digits as its factorization.

201696251693813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 201696251693813 in words is "two hundred one trillion, six hundred ninety-six billion, two hundred fifty-one million, six hundred ninety-three thousand, eight hundred thirteen".