11604433261 has 2 divisors, whose sum is σ = 11604433262. Its totient is φ = 11604433260.

The previous prime is 11604433207. The next prime is 11604433327. The reversal of 11604433261 is 16233440611.

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., 8647140100 + 2957293161 = 92990^2 + 54381^2 .

It is an emirp because it is prime and its reverse (16233440611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11604433261 - 2¹³ = 11604425069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11604433361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5802216630 + 5802216631.

It is an arithmetic number, because the mean of its divisors is an integer number (5802216631).

Almost surely, 2^11604433261 is an apocalyptic number.

It is an amenable number.

11604433261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11604433261 is an equidigital number, since it uses as much as digits as its factorization.

11604433261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 11604433261 its reverse (16233440611), we get a palindrome (27837873872).

The spelling of 11604433261 in words is "eleven billion, six hundred four million, four hundred thirty-three thousand, two hundred sixty-one".