11663017523 has 4 divisors (see below), whose sum is σ = 11911166880. Its totient is φ = 11414868168.

The previous prime is 11663017511. The next prime is 11663017547. The reversal of 11663017523 is 32571036611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11663017523 - 2⁶ = 11663017459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11663017573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124074608 + ... + 124074701.

It is an arithmetic number, because the mean of its divisors is an integer number (2977791720).

Almost surely, 2^11663017523 is an apocalyptic number.

11663017523 is a deficient number, since it is larger than the sum of its proper divisors (248149357).

11663017523 is an equidigital number, since it uses as much as digits as its factorization.

11663017523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248149356.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 11663017523 in words is "eleven billion, six hundred sixty-three million, seventeen thousand, five hundred twenty-three".