203436661049 has 2 divisors, whose sum is σ = 203436661050. Its totient is φ = 203436661048.

The previous prime is 203436661031. The next prime is 203436661093. The reversal of 203436661049 is 940166634302.

It is an a-pointer prime, because the next prime (203436661093) can be obtained adding 203436661049 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185067738025 + 18368923024 = 430195^2 + 135532^2 .

It is a cyclic number.

It is not a de Polignac number, because 203436661049 - 2⁸ = 203436660793 is a prime.

It is not a weakly prime, because it can be changed into another prime (203436661019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101718330524 + 101718330525.

It is an arithmetic number, because the mean of its divisors is an integer number (101718330525).

Almost surely, 2^203436661049 is an apocalyptic number.

It is an amenable number.

203436661049 is a deficient number, since it is larger than the sum of its proper divisors (1).

203436661049 is an equidigital number, since it uses as much as digits as its factorization.

203436661049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 44.

The spelling of 203436661049 in words is "two hundred three billion, four hundred thirty-six million, six hundred sixty-one thousand, forty-nine".