103655249561 has 2 divisors, whose sum is σ = 103655249562. Its totient is φ = 103655249560.

The previous prime is 103655249491. The next prime is 103655249611. The reversal of 103655249561 is 165942556301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63942731161 + 39712518400 = 252869^2 + 199280^2 .

It is a cyclic number.

It is not a de Polignac number, because 103655249561 - 2¹⁴ = 103655233177 is a prime.

It is not a weakly prime, because it can be changed into another prime (103655249261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51827624780 + 51827624781.

It is an arithmetic number, because the mean of its divisors is an integer number (51827624781).

Almost surely, 2^103655249561 is an apocalyptic number.

It is an amenable number.

103655249561 is a deficient number, since it is larger than the sum of its proper divisors (1).

103655249561 is an equidigital number, since it uses as much as digits as its factorization.

103655249561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 103655249561 in words is "one hundred three billion, six hundred fifty-five million, two hundred forty-nine thousand, five hundred sixty-one".