203668838641 has 2 divisors, whose sum is σ = 203668838642. Its totient is φ = 203668838640.

The previous prime is 203668838627. The next prime is 203668838693. The reversal of 203668838641 is 146838866302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106945350625 + 96723488016 = 327025^2 + 311004^2 .

It is a cyclic number.

It is not a de Polignac number, because 203668838641 - 2¹⁷ = 203668707569 is a prime.

It is not a weakly prime, because it can be changed into another prime (203668038641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101834419320 + 101834419321.

It is an arithmetic number, because the mean of its divisors is an integer number (101834419321).

Almost surely, 2^203668838641 is an apocalyptic number.

It is an amenable number.

203668838641 is a deficient number, since it is larger than the sum of its proper divisors (1).

203668838641 is an equidigital number, since it uses as much as digits as its factorization.

203668838641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 203668838641 in words is "two hundred three billion, six hundred sixty-eight million, eight hundred thirty-eight thousand, six hundred forty-one".