11403605261 has 2 divisors, whose sum is σ = 11403605262. Its totient is φ = 11403605260.

The previous prime is 11403605201. The next prime is 11403605267. The reversal of 11403605261 is 16250630411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8458480900 + 2945124361 = 91970^2 + 54269^2 .

It is a cyclic number.

It is not a de Polignac number, because 11403605261 - 2¹⁰ = 11403604237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11403605267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5701802630 + 5701802631.

It is an arithmetic number, because the mean of its divisors is an integer number (5701802631).

Almost surely, 2^11403605261 is an apocalyptic number.

It is an amenable number.

11403605261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11403605261 is an equidigital number, since it uses as much as digits as its factorization.

11403605261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 11403605261 in words is "eleven billion, four hundred three million, six hundred five thousand, two hundred sixty-one".