11661758263 has 4 divisors (see below), whose sum is σ = 11662104240. Its totient is φ = 11661412288.

The previous prime is 11661758203. The next prime is 11661758267. The reversal of 11661758263 is 36285716611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36285716611 = 317 ⋅114465983.

It is a cyclic number.

It is not a de Polignac number, because 11661758263 - 2²⁹ = 11124887351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661758267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116218 + ... + 191911.

It is an arithmetic number, because the mean of its divisors is an integer number (2915526060).

Almost surely, 2^11661758263 is an apocalyptic number.

11661758263 is a deficient number, since it is larger than the sum of its proper divisors (345977).

11661758263 is an equidigital number, since it uses as much as digits as its factorization.

11661758263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345976.

The product of its digits is 362880, while the sum is 46.

The spelling of 11661758263 in words is "eleven billion, six hundred sixty-one million, seven hundred fifty-eight thousand, two hundred sixty-three".