100000000503661 has 2 divisors, whose sum is σ = 100000000503662. Its totient is φ = 100000000503660.

The previous prime is 100000000503631. The next prime is 100000000503707. The reversal of 100000000503661 is 166305000000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84378811410436 + 15621189093225 = 9185794^2 + 3952365^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000000503661 - 2⁹ = 100000000503149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100000000503631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000000251830 + 50000000251831.

It is an arithmetic number, because the mean of its divisors is an integer number (50000000251831).

Almost surely, 2^{100000000503661} is an apocalyptic number.

It is an amenable number.

100000000503661 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000000503661 is an equidigital number, since it uses as much as digits as its factorization.

100000000503661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 100000000503661 its reverse (166305000000001), we get a palindrome (266305000503662).

The spelling of 100000000503661 in words is "one hundred trillion, five hundred three thousand, six hundred sixty-one".