103756663561 has 2 divisors, whose sum is σ = 103756663562. Its totient is φ = 103756663560.

The previous prime is 103756663559. The next prime is 103756663639. The reversal of 103756663561 is 165366657301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76801591161 + 26955072400 = 277131^2 + 164180^2 .

It is a cyclic number.

It is not a de Polignac number, because 103756663561 - 2¹ = 103756663559 is a prime.

Together with 103756663559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (103756666561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51878331780 + 51878331781.

It is an arithmetic number, because the mean of its divisors is an integer number (51878331781).

Almost surely, 2^103756663561 is an apocalyptic number.

It is an amenable number.

103756663561 is a deficient number, since it is larger than the sum of its proper divisors (1).

103756663561 is an equidigital number, since it uses as much as digits as its factorization.

103756663561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 49.

The spelling of 103756663561 in words is "one hundred three billion, seven hundred fifty-six million, six hundred sixty-three thousand, five hundred sixty-one".