202643263633493 has 2 divisors, whose sum is σ = 202643263633494. Its totient is φ = 202643263633492.

The previous prime is 202643263633451. The next prime is 202643263633513. The reversal of 202643263633493 is 394336362346202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114534666155569 + 88108597477924 = 10702087^2 + 9386618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202643263633493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202643263633093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101321631816746 + 101321631816747.

It is an arithmetic number, because the mean of its divisors is an integer number (101321631816747).

Almost surely, 2^{202643263633493} is an apocalyptic number.

It is an amenable number.

202643263633493 is a deficient number, since it is larger than the sum of its proper divisors (1).

202643263633493 is an equidigital number, since it uses as much as digits as its factorization.

202643263633493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60466176, while the sum is 56.

The spelling of 202643263633493 in words is "two hundred two trillion, six hundred forty-three billion, two hundred sixty-three million, six hundred thirty-three thousand, four hundred ninety-three".