11811936523 has 4 divisors (see below), whose sum is σ = 11812301848. Its totient is φ = 11811571200.

The previous prime is 11811936509. The next prime is 11811936527. The reversal of 11811936523 is 32563911811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32563911811 = 100469 ⋅324119.

It is a cyclic number.

It is not a de Polignac number, because 11811936523 - 2⁵ = 11811936491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11811936527) 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, 128886 + ... + 200587.

It is an arithmetic number, because the mean of its divisors is an integer number (2953075462).

Almost surely, 2^11811936523 is an apocalyptic number.

11811936523 is a deficient number, since it is larger than the sum of its proper divisors (365325).

11811936523 is an equidigital number, since it uses as much as digits as its factorization.

11811936523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365324.

The product of its digits is 38880, while the sum is 40.

The spelling of 11811936523 in words is "eleven billion, eight hundred eleven million, nine hundred thirty-six thousand, five hundred twenty-three".