203426540641 has 2 divisors, whose sum is σ = 203426540642. Its totient is φ = 203426540640.

The previous prime is 203426540621. The next prime is 203426540689. The reversal of 203426540641 is 146045624302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178421760000 + 25004780641 = 422400^2 + 158129^2 .

It is a cyclic number.

It is not a de Polignac number, because 203426540641 - 2⁵ = 203426540609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203426540641.

It is not a weakly prime, because it can be changed into another prime (203426540621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101713270320 + 101713270321.

It is an arithmetic number, because the mean of its divisors is an integer number (101713270321).

Almost surely, 2^203426540641 is an apocalyptic number.

It is an amenable number.

203426540641 is a deficient number, since it is larger than the sum of its proper divisors (1).

203426540641 is an equidigital number, since it uses as much as digits as its factorization.

203426540641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 203426540641 in words is "two hundred three billion, four hundred twenty-six million, five hundred forty thousand, six hundred forty-one".