203788538641 has 8 divisors (see below), whose sum is σ = 206943262920. Its totient is φ = 200643628032.

The previous prime is 203788538573. The next prime is 203788538647. The reversal of 203788538641 is 146835887302.

It can be written as a sum of positive squares in 4 ways, for example, as 55797526225 + 147991012416 = 236215^2 + 384696^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203788538641 - 2³⁵ = 169428800273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203788538647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411560 + ... + 2494633.

It is an arithmetic number, because the mean of its divisors is an integer number (25867907865).

Almost surely, 2^203788538641 is an apocalyptic number.

It is an amenable number.

203788538641 is a deficient number, since it is larger than the sum of its proper divisors (3154724279).

203788538641 is an equidigital number, since it uses as much as digits as its factorization.

203788538641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906835.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 203788538641 in words is "two hundred three billion, seven hundred eighty-eight million, five hundred thirty-eight thousand, six hundred forty-one".