202681253786281 has 2 divisors, whose sum is σ = 202681253786282. Its totient is φ = 202681253786280.

The previous prime is 202681253786171. The next prime is 202681253786311. The reversal of 202681253786281 is 182687352186202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155685910037056 + 46995343749225 = 12477416^2 + 6855315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202681253786281 is a prime.

It is a super-2 number, since 2×202681253786281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202681253186281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101340626893140 + 101340626893141.

It is an arithmetic number, because the mean of its divisors is an integer number (101340626893141).

Almost surely, 2^{202681253786281} is an apocalyptic number.

It is an amenable number.

202681253786281 is a deficient number, since it is larger than the sum of its proper divisors (1).

202681253786281 is an equidigital number, since it uses as much as digits as its factorization.

202681253786281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 202681253786281 in words is "two hundred two trillion, six hundred eighty-one billion, two hundred fifty-three million, seven hundred eighty-six thousand, two hundred eighty-one".